257064632 has 16 divisors (see below), whose sum is σ = 525814200. Its totient is φ = 116847520.

The previous prime is 257064631. The next prime is 257064649. The reversal of 257064632 is 236460752.

It is a junction number, because it is equal to n+sod(n) for n = 257064592 and 257064601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257064631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1460507 + ... + 1460682.

Almost surely, 2^257064632 is an apocalyptic number.

257064632 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

257064632 is an abundant number, since it is smaller than the sum of its proper divisors (268749568).

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

257064632 is a wasteful number, since it uses less digits than its factorization.

257064632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921206 (or 2921202 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 257064632 is about 16033.2352318551. The cubic root of 257064632 is about 635.8394106896.

The spelling of 257064632 in words is "two hundred fifty-seven million, sixty-four thousand, six hundred thirty-two".