398277656 has 32 divisors (see below), whose sum is σ = 855588000. Its totient is φ = 170263296.

The previous prime is 398277613. The next prime is 398277661. The reversal of 398277656 is 656772893.

It is a junction number, because it is equal to n+sod(n) for n = 398277598 and 398277607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14210 + ... + 31598.

It is an arithmetic number, because the mean of its divisors is an integer number (26737125).

Almost surely, 2^398277656 is an apocalyptic number.

It is an amenable number.

398277656 is an abundant number, since it is smaller than the sum of its proper divisors (457310344).

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

398277656 is a wasteful number, since it uses less digits than its factorization.

398277656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17811 (or 17807 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 53.

The square root of 398277656 is about 19956.8949488642. The cubic root of 398277656 is about 735.7472499726.

The spelling of 398277656 in words is "three hundred ninety-eight million, two hundred seventy-seven thousand, six hundred fifty-six".