398745432 has 24 divisors (see below), whose sum is σ = 1079935740. Its totient is φ = 132915120.

The previous prime is 398745427. The next prime is 398745437. The reversal of 398745432 is 234547893.

398745432 is a `hidden beast` number, since 39 + 8 + 74 + 543 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (398745427) and next prime (398745437).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398745437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2768994 + ... + 2769137.

Almost surely, 2^398745432 is an apocalyptic number.

It is an amenable number.

398745432 is an abundant number, since it is smaller than the sum of its proper divisors (681190308).

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

398745432 is a wasteful number, since it uses less digits than its factorization.

398745432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538143 (or 5538136 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 398745432 is about 19968.6111685315. The cubic root of 398745432 is about 736.0351816437.

The spelling of 398745432 in words is "three hundred ninety-eight million, seven hundred forty-five thousand, four hundred thirty-two".