256308612 has 72 divisors (see below), whose sum is σ = 719732160. Its totient is φ = 70701120.

The previous prime is 256308607. The next prime is 256308631. The reversal of 256308612 is 216803652.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9537 + ... + 24567.

It is an arithmetic number, because the mean of its divisors is an integer number (9996280).

Almost surely, 2^256308612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256308612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359866080).

256308612 is an abundant number, since it is smaller than the sum of its proper divisors (463423548).

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

256308612 is a wasteful number, since it uses less digits than its factorization.

256308612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15081 (or 15072 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 256308612 is about 16009.6412202148. The cubic root of 256308612 is about 635.2154698957.

The spelling of 256308612 in words is "two hundred fifty-six million, three hundred eight thousand, six hundred twelve".