398907970 has 8 divisors (see below), whose sum is σ = 718034364. Its totient is φ = 159563184.

The previous prime is 398907961. The next prime is 398907997. The reversal of 398907970 is 79709893.

It can be written as a sum of positive squares in 2 ways, for example, as 385062129 + 13845841 = 19623^2 + 3721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19945389 + ... + 19945408.

Almost surely, 2^398907970 is an apocalyptic number.

398907970 is a deficient number, since it is larger than the sum of its proper divisors (319126394).

398907970 is a wasteful number, since it uses less digits than its factorization.

398907970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39890804.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 398907970 is about 19972.6805912476. The cubic root of 398907970 is about 736.1351764652.

The spelling of 398907970 in words is "three hundred ninety-eight million, nine hundred seven thousand, nine hundred seventy".