257887442 has 8 divisors (see below), whose sum is σ = 391728000. Its totient is φ = 127311444.

The previous prime is 257887423. The next prime is 257887471. The reversal of 257887442 is 244788752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815942 + ... + 816257.

It is an arithmetic number, because the mean of its divisors is an integer number (48966000).

Almost surely, 2^257887442 is an apocalyptic number.

257887442 is a deficient number, since it is larger than the sum of its proper divisors (133840558).

257887442 is a wasteful number, since it uses less digits than its factorization.

257887442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632280.

The product of its digits is 1003520, while the sum is 47.

The square root of 257887442 is about 16058.8742444793. The cubic root of 257887442 is about 636.5170843946.

The spelling of 257887442 in words is "two hundred fifty-seven million, eight hundred eighty-seven thousand, four hundred forty-two".