257463642 has 16 divisors (see below), whose sum is σ = 542028960. Its totient is φ = 81304272.

The previous prime is 257463637. The next prime is 257463643. The reversal of 257463642 is 246364752.

It is a self number, because there is not a number n which added to its sum of digits gives 257463642.

It is not an unprimeable number, because it can be changed into a prime (257463643) 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, 1129113 + ... + 1129340.

It is an arithmetic number, because the mean of its divisors is an integer number (33876810).

Almost surely, 2^257463642 is an apocalyptic number.

257463642 is an abundant number, since it is smaller than the sum of its proper divisors (284565318).

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

257463642 is a wasteful number, since it uses less digits than its factorization.

257463642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258477.

The product of its digits is 241920, while the sum is 39.

The square root of 257463642 is about 16045.6736225065. The cubic root of 257463642 is about 636.1682192187.

The spelling of 257463642 in words is "two hundred fifty-seven million, four hundred sixty-three thousand, six hundred forty-two".