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40000030 = 2571394111
BaseRepresentation
bin1001100010010…
…1101000011110
32210021012201121
42120211220132
540220000110
63545201154
7663665110
oct230455036
983235647
1040000030
1120640684
12114901ba
138396875
1454533b0
1537a1cda
hex2625a1e

40000030 has 32 divisors (see below), whose sum is σ = 82897920. Its totient is φ = 13612320.

The previous prime is 40000021. The next prime is 40000033. The reversal of 40000030 is 3000004.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a junction number, because it is equal to n+sod(n) for n = 39999968 and 40000022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7675 + ... + 11785.

It is an arithmetic number, because the mean of its divisors is an integer number (2590560).

Almost surely, 240000030 is an apocalyptic number.

40000030 is an abundant number, since it is smaller than the sum of its proper divisors (42897890).

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

40000030 is a wasteful number, since it uses less digits than its factorization.

40000030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264.

The product of its (nonzero) digits is 12, while the sum is 7.

The square root of 40000030 is about 6324.5576920446. The cubic root of 40000030 is about 341.9952748341.

Adding to 40000030 its reverse (3000004), we get a palindrome (43000034).

The spelling of 40000030 in words is "forty million, thirty", and thus it is an aban number, an eban number, and an uban number.

Divisors: 1 2 5 7 10 14 35 70 139 278 695 973 1390 1946 4111 4865 8222 9730 20555 28777 41110 57554 143885 287770 571429 1142858 2857145 4000003 5714290 8000006 20000015 40000030