257888028 has 48 divisors (see below), whose sum is σ = 651974400. Its totient is φ = 79021824.

The previous prime is 257888027. The next prime is 257888063. The reversal of 257888028 is 820888752.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257888021) 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 15 ways as a sum of consecutive naturals, for example, 5928 + ... + 23471.

It is an arithmetic number, because the mean of its divisors is an integer number (13582800).

Almost surely, 2^257888028 is an apocalyptic number.

It is an amenable number.

257888028 is an abundant number, since it is smaller than the sum of its proper divisors (394086372).

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

257888028 is a wasteful number, since it uses less digits than its factorization.

257888028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29466 (or 29464 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 48.

The square root of 257888028 is about 16058.8924898325. The cubic root of 257888028 is about 636.5175665154.

The spelling of 257888028 in words is "two hundred fifty-seven million, eight hundred eighty-eight thousand, twenty-eight".