398374906 has 16 divisors (see below), whose sum is σ = 638983080. Its totient is φ = 185612800.

The previous prime is 398374897. The next prime is 398374913. The reversal of 398374906 is 609473893.

It can be written as a sum of positive squares in 4 ways, for example, as 381850681 + 16524225 = 19541^2 + 4065^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 398374906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54571 + ... + 61438.

Almost surely, 2^398374906 is an apocalyptic number.

398374906 is a deficient number, since it is larger than the sum of its proper divisors (240608174).

398374906 is a wasteful number, since it uses less digits than its factorization.

398374906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116129.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 398374906 is about 19959.3313014239. The cubic root of 398374906 is about 735.8071291348.

The spelling of 398374906 in words is "three hundred ninety-eight million, three hundred seventy-four thousand, nine hundred six".