257676240 has 40 divisors (see below), whose sum is σ = 798797088. Its totient is φ = 68713600.

The previous prime is 257676227. The next prime is 257676241. The reversal of 257676240 is 42676752.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257676241) 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 7 ways as a sum of consecutive naturals, for example, 536586 + ... + 537065.

Almost surely, 2^257676240 is an apocalyptic number.

257676240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257676240 is an abundant number, since it is smaller than the sum of its proper divisors (541120848).

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

257676240 is a wasteful number, since it uses less digits than its factorization.

257676240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073667 (or 1073661 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 39.

The square root of 257676240 is about 16052.2970318892. The cubic root of 257676240 is about 636.3432742031.

The spelling of 257676240 in words is "two hundred fifty-seven million, six hundred seventy-six thousand, two hundred forty".