328577857 has 2 divisors, whose sum is σ = 328577858. Its totient is φ = 328577856.

The previous prime is 328577831. The next prime is 328577861. The reversal of 328577857 is 758775823.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259338816 + 69239041 = 16104^2 + 8321^2 .

It is a cyclic number.

It is not a de Polignac number, because 328577857 - 2⁷ = 328577729 is a prime.

It is a super-2 number, since 2×328577857² = 215926816221424898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (328577867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164288928 + 164288929.

It is an arithmetic number, because the mean of its divisors is an integer number (164288929).

Almost surely, 2^328577857 is an apocalyptic number.

It is an amenable number.

328577857 is a deficient number, since it is larger than the sum of its proper divisors (1).

328577857 is an equidigital number, since it uses as much as digits as its factorization.

328577857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3292800, while the sum is 52.

The square root of 328577857 is about 18126.7166635329. The cubic root of 328577857 is about 690.0482056918.

The spelling of 328577857 in words is "three hundred twenty-eight million, five hundred seventy-seven thousand, eight hundred fifty-seven".