397987952 has 40 divisors (see below), whose sum is σ = 851972256. Its totient is φ = 179142656.

The previous prime is 397987937. The next prime is 397987957. The reversal of 397987952 is 259789793.

It is a junction number, because it is equal to n+sod(n) for n = 397987891 and 397987900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397987957) 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, 25553 + ... + 38064.

Almost surely, 2^397987952 is an apocalyptic number.

It is an amenable number.

397987952 is an abundant number, since it is smaller than the sum of its proper divisors (453984304).

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

397987952 is a wasteful number, since it uses less digits than its factorization.

397987952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63665 (or 63659 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 59.

The square root of 397987952 is about 19949.6353851392. The cubic root of 397987952 is about 735.5688144683.

The spelling of 397987952 in words is "three hundred ninety-seven million, nine hundred eighty-seven thousand, nine hundred fifty-two".