398390634 has 48 divisors (see below), whose sum is σ = 882666720. Its totient is φ = 129826080.

The previous prime is 398390617. The next prime is 398390677. The reversal of 398390634 is 436093893.

398390634 is a `hidden beast` number, since 3 + 9 + 8 + 3 + 9 + 0 + 634 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 398390634.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195529 + ... + 197555.

It is an arithmetic number, because the mean of its divisors is an integer number (18388890).

Almost surely, 2^398390634 is an apocalyptic number.

398390634 is an abundant number, since it is smaller than the sum of its proper divisors (484276086).

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

398390634 is a wasteful number, since it uses less digits than its factorization.

398390634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275 (or 2272 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 398390634 is about 19959.7252987109. The cubic root of 398390634 is about 735.8168123269.

The spelling of 398390634 in words is "three hundred ninety-eight million, three hundred ninety thousand, six hundred thirty-four".