398607956 has 24 divisors (see below), whose sum is σ = 723141216. Its totient is φ = 192097440.

The previous prime is 398607947. The next prime is 398607971. The reversal of 398607956 is 659706893.

It is a junction number, because it is equal to n+sod(n) for n = 398607898 and 398607907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3251 + ... + 28421.

It is an arithmetic number, because the mean of its divisors is an integer number (30130884).

Almost surely, 2^398607956 is an apocalyptic number.

It is an amenable number.

398607956 is a deficient number, since it is larger than the sum of its proper divisors (324533260).

398607956 is a wasteful number, since it uses less digits than its factorization.

398607956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25319 (or 25317 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 398607956 is about 19965.1685692859. The cubic root of 398607956 is about 735.9505839735.

The spelling of 398607956 in words is "three hundred ninety-eight million, six hundred seven thousand, nine hundred fifty-six".