257328207 has 12 divisors (see below), whose sum is σ = 371970040. Its totient is φ = 171425808.

The previous prime is 257328161. The next prime is 257328217. The reversal of 257328207 is 702823752.

It is a happy number.

257328207 is a `hidden beast` number, since 2 + 573 + 2 + 82 + 0 + 7 = 666.

It is not a de Polignac number, because 257328207 - 2⁷ = 257328079 is a prime.

It is a super-2 number, since 2×257328207² = 132435612235669698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257328217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3333 + ... + 22929.

Almost surely, 2^257328207 is an apocalyptic number.

257328207 is a deficient number, since it is larger than the sum of its proper divisors (114641833).

257328207 is a wasteful number, since it uses less digits than its factorization.

257328207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21062 (or 21059 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 257328207 is about 16041.4527708684. The cubic root of 257328207 is about 636.0566506438.

The spelling of 257328207 in words is "two hundred fifty-seven million, three hundred twenty-eight thousand, two hundred seven".