396090857 has 4 divisors (see below), whose sum is σ = 400863120. Its totient is φ = 391318596.

The previous prime is 396090847. The next prime is 396090881. The reversal of 396090857 is 758090693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 396090857 - 2⁸ = 396090601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396090817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2386007 + ... + 2386172.

It is an arithmetic number, because the mean of its divisors is an integer number (100215780).

Almost surely, 2^396090857 is an apocalyptic number.

It is an amenable number.

396090857 is a deficient number, since it is larger than the sum of its proper divisors (4772263).

396090857 is an equidigital number, since it uses as much as digits as its factorization.

396090857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772262.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 396090857 is about 19902.0314792234. The cubic root of 396090857 is about 734.3982036236.

The spelling of 396090857 in words is "three hundred ninety-six million, ninety thousand, eight hundred fifty-seven".