257394040 has 32 divisors (see below), whose sum is σ = 583569360. Its totient is φ = 102169600.

The previous prime is 257394037. The next prime is 257394077. The reversal of 257394040 is 40493752.

It is a junction number, because it is equal to n+sod(n) for n = 257393987 and 257394005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19321 + ... + 29800.

Almost surely, 2^257394040 is an apocalyptic number.

257394040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257394040 is an abundant number, since it is smaller than the sum of its proper divisors (326175320).

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

257394040 is a wasteful number, since it uses less digits than its factorization.

257394040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49263 (or 49259 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 257394040 is about 16043.5046046679. The cubic root of 257394040 is about 636.1108874071.

The spelling of 257394040 in words is "two hundred fifty-seven million, three hundred ninety-four thousand, forty".