398837312 has 14 divisors (see below), whose sum is σ = 791442918. Its totient is φ = 199418624.

The previous prime is 398837293. The next prime is 398837333. The reversal of 398837312 is 213738893.

It can be written as a sum of positive squares in only one way, i.e., 320266816 + 78570496 = 17896^2 + 8864^2 .

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, 3115853 + ... + 3115980.

It is an arithmetic number, because the mean of its divisors is an integer number (56531637).

Almost surely, 2^398837312 is an apocalyptic number.

398837312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

398837312 is a deficient number, since it is larger than the sum of its proper divisors (392605606).

398837312 is an equidigital number, since it uses as much as digits as its factorization.

398837312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6231845 (or 6231835 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 398837312 is about 19970.9116466925. The cubic root of 398837312 is about 736.0917103740.

The spelling of 398837312 in words is "three hundred ninety-eight million, eight hundred thirty-seven thousand, three hundred twelve".