257790828 has 24 divisors (see below), whose sum is σ = 602638960. Its totient is φ = 85769280.

The previous prime is 257790809. The next prime is 257790829. The reversal of 257790828 is 828097752.

It is a super-2 number, since 2×257790828² = 132912222001851168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257790829) 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, 13363 + ... + 26346.

Almost surely, 2^257790828 is an apocalyptic number.

It is an amenable number.

257790828 is an abundant number, since it is smaller than the sum of its proper divisors (344848132).

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

257790828 is a wasteful number, since it uses less digits than its factorization.

257790828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40257 (or 40255 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 257790828 is about 16055.8658439836. The cubic root of 257790828 is about 636.4375869954.

The spelling of 257790828 in words is "two hundred fifty-seven million, seven hundred ninety thousand, eight hundred twenty-eight".