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4020030 = 23457709
BaseRepresentation
bin1111010101011100111110
321120020110000
433111130332
52012120110
6222055130
746112130
oct17253476
97506400
104020030
1122a6343
12141a4a6
13aa9a21
14769050
155461c0
hex3d573e

4020030 has 80 divisors (see below), whose sum is σ = 12371040. Its totient is φ = 917568.

The previous prime is 4020017. The next prime is 4020031. The reversal of 4020030 is 300204.

4020030 = 10012 + 10022 + ... + 10042.

4020030 is a nontrivial binomial coefficient, being equal to C(2836, 2).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 4019994 and 4020021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020031) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5316 + ... + 6024.

It is an arithmetic number, because the mean of its divisors is an integer number (154638).

Almost surely, 24020030 is an apocalyptic number.

4020030 is the 2835-th triangular number and also the 1418-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4020030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6185520).

4020030 is an abundant number, since it is smaller than the sum of its proper divisors (8351010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4020030 is a wasteful number, since it uses less digits than its factorization.

4020030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 4020030 is about 2005.0012468824. The cubic root of 4020030 is about 159.0046278468.

Adding to 4020030 its reverse (300204), we get a palindrome (4320234).

The spelling of 4020030 in words is "four million, twenty thousand, thirty".

Divisors: 1 2 3 5 6 7 9 10 14 15 18 21 27 30 35 42 45 54 63 70 81 90 105 126 135 162 189 210 270 315 378 405 567 630 709 810 945 1134 1418 1890 2127 2835 3545 4254 4963 5670 6381 7090 9926 10635 12762 14889 19143 21270 24815 29778 31905 38286 44667 49630 57429 63810 74445 89334 95715 114858 134001 148890 191430 223335 268002 287145 402003 446670 574290 670005 804006 1340010 2010015 4020030