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120030612 = 223137110837
BaseRepresentation
bin1110010011110…
…00010110010100
322100212012001020
413021320112110
5221211434422
615524401140
72655146322
oct711702624
9270765036
10120030612
1161832859
12342461b0
131bb37b40
1411d26d12
15a80e95c
hex7278594

120030612 has 48 divisors (see below), whose sum is σ = 305891712. Its totient is φ = 36408960.

The previous prime is 120030611. The next prime is 120030641. The reversal of 120030612 is 216030021.

It is a junction number, because it is equal to n+sod(n) for n = 120030591 and 120030600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120030611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5658 + ... + 16494.

It is an arithmetic number, because the mean of its divisors is an integer number (6372744).

Almost surely, 2120030612 is an apocalyptic number.

120030612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120030612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152945856).

120030612 is an abundant number, since it is smaller than the sum of its proper divisors (185861100).

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

120030612 is a wasteful number, since it uses less digits than its factorization.

120030612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10928 (or 10926 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 120030612 is about 10955.8483012499. The cubic root of 120030612 is about 493.2843533468.

Adding to 120030612 its reverse (216030021), we get a palindrome (336060633).

The spelling of 120030612 in words is "one hundred twenty million, thirty thousand, six hundred twelve".

Divisors: 1 2 3 4 6 12 13 26 39 52 71 78 142 156 213 284 426 852 923 1846 2769 3692 5538 10837 11076 21674 32511 43348 65022 130044 140881 281762 422643 563524 769427 845286 1538854 1690572 2308281 3077708 4616562 9233124 10002551 20005102 30007653 40010204 60015306 120030612