398862928 has 10 divisors (see below), whose sum is σ = 772796954. Its totient is φ = 199431456.

The previous prime is 398862911. The next prime is 398862973. The reversal of 398862928 is 829268893.

It can be written as a sum of positive squares in only one way, i.e., 396328464 + 2534464 = 19908^2 + 1592^2 .

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 as a sum of consecutive naturals, namely, 12464451 + ... + 12464482.

Almost surely, 2^398862928 is an apocalyptic number.

It is an amenable number.

398862928 is a deficient number, since it is larger than the sum of its proper divisors (373934026).

398862928 is a wasteful number, since it uses less digits than its factorization.

398862928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24928941 (or 24928935 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 398862928 is about 19971.5529691609. The cubic root of 398862928 is about 736.1074689477.

The spelling of 398862928 in words is "three hundred ninety-eight million, eight hundred sixty-two thousand, nine hundred twenty-eight".