397974528 has 264 divisors, whose sum is σ = 1362483200. Its totient is φ = 109486080.

The previous prime is 397974491. The next prime is 397974541. The reversal of 397974528 is 825479793.

It is a congruent number.

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, 1999773 + ... + 1999971.

Almost surely, 2^397974528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397974528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681241600).

397974528 is an abundant number, since it is smaller than the sum of its proper divisors (964508672).

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

397974528 is a wasteful number, since it uses less digits than its factorization.

397974528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 242 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 397974528 is about 19949.2989350503. The cubic root of 397974528 is about 735.5605442123.

The spelling of 397974528 in words is "three hundred ninety-seven million, nine hundred seventy-four thousand, five hundred twenty-eight".