398965896 has 48 divisors (see below), whose sum is σ = 1234896000. Its totient is φ = 113990112.

The previous prime is 398965873. The next prime is 398965901. The reversal of 398965896 is 698569893.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395296 + ... + 396303.

It is an arithmetic number, because the mean of its divisors is an integer number (25727000).

Almost surely, 2^398965896 is an apocalyptic number.

398965896 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

398965896 is an abundant number, since it is smaller than the sum of its proper divisors (835930104).

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

398965896 is a wasteful number, since it uses less digits than its factorization.

398965896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791618 (or 791611 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 63.

The square root of 398965896 is about 19974.1306694434. The cubic root of 398965896 is about 736.1708064898.

The spelling of 398965896 in words is "three hundred ninety-eight million, nine hundred sixty-five thousand, eight hundred ninety-six".