257981612 has 24 divisors (see below), whose sum is σ = 529910304. Its totient is φ = 107574912.

The previous prime is 257981611. The next prime is 257981623. The reversal of 257981612 is 216189752.

It is a self number, because there is not a number n which added to its sum of digits gives 257981612.

It is not an unprimeable number, because it can be changed into a prime (257981611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123473 + ... + 125544.

It is an arithmetic number, because the mean of its divisors is an integer number (22079596).

Almost surely, 2^257981612 is an apocalyptic number.

It is an amenable number.

257981612 is an abundant number, since it is smaller than the sum of its proper divisors (271928692).

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

257981612 is a wasteful number, since it uses less digits than its factorization.

257981612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249065 (or 249063 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 257981612 is about 16061.8060005717. The cubic root of 257981612 is about 636.5945516789.

The spelling of 257981612 in words is "two hundred fifty-seven million, nine hundred eighty-one thousand, six hundred twelve".