398190964 has 6 divisors (see below), whose sum is σ = 696834194. Its totient is φ = 199095480.

The previous prime is 398190943. The next prime is 398190979. The reversal of 398190964 is 469091893.

It can be written as a sum of positive squares in only one way, i.e., 394419600 + 3771364 = 19860^2 + 1942^2 .

It is a super-2 number, since 2×398190964² = 317112087622498592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49773867 + ... + 49773874.

Almost surely, 2^398190964 is an apocalyptic number.

It is an amenable number.

398190964 is a deficient number, since it is larger than the sum of its proper divisors (298643230).

398190964 is a wasteful number, since it uses less digits than its factorization.

398190964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99547745 (or 99547743 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 398190964 is about 19954.7228494910. The cubic root of 398190964 is about 735.6938634066.

The spelling of 398190964 in words is "three hundred ninety-eight million, one hundred ninety thousand, nine hundred sixty-four".