398926724 has 24 divisors (see below), whose sum is σ = 823592448. Its totient is φ = 165453120.

The previous prime is 398926699. The next prime is 398926727. The reversal of 398926724 is 427629893.

It is a super-2 number, since 2×398926724² = 318285062242744352, which contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (398926727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228929 + ... + 230664.

It is an arithmetic number, because the mean of its divisors is an integer number (34316352).

Almost surely, 2^398926724 is an apocalyptic number.

It is an amenable number.

398926724 is an abundant number, since it is smaller than the sum of its proper divisors (424665724).

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

398926724 is a wasteful number, since it uses less digits than its factorization.

398926724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459635 (or 459633 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 398926724 is about 19973.1500770409. The cubic root of 398926724 is about 736.1467123446.

The spelling of 398926724 in words is "three hundred ninety-eight million, nine hundred twenty-six thousand, seven hundred twenty-four".