397434528 has 36 divisors (see below), whose sum is σ = 1130205258. Its totient is φ = 132478080.

The previous prime is 397434523. The next prime is 397434529. The reversal of 397434528 is 825434793.

397434528 is a `hidden beast` number, since 3 + 97 + 4 + 34 + 528 = 666.

It can be written as a sum of positive squares in only one way, i.e., 387774864 + 9659664 = 19692^2 + 3108^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (397434523) 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, 689703 + ... + 690278.

Almost surely, 2^397434528 is an apocalyptic number.

It is an amenable number.

397434528 is an abundant number, since it is smaller than the sum of its proper divisors (732770730).

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

397434528 is a wasteful number, since it uses less digits than its factorization.

397434528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379997 (or 1379986 counting only the distinct ones).

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

The square root of 397434528 is about 19935.7600306585. The cubic root of 397434528 is about 735.2277067630.

The spelling of 397434528 in words is "three hundred ninety-seven million, four hundred thirty-four thousand, five hundred twenty-eight".