397976528 has 20 divisors (see below), whose sum is σ = 816437700. Its totient is φ = 187282944.

The previous prime is 397976519. The next prime is 397976569. The reversal of 397976528 is 825679793.

It can be written as a sum of positive squares in 2 ways, for example, as 305970064 + 92006464 = 17492^2 + 9592^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 731303 + ... + 731846.

It is an arithmetic number, because the mean of its divisors is an integer number (40821885).

Almost surely, 2^397976528 is an apocalyptic number.

It is an amenable number.

397976528 is an abundant number, since it is smaller than the sum of its proper divisors (418461172).

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

397976528 is a wasteful number, since it uses less digits than its factorization.

397976528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463174 (or 1463168 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 56.

The square root of 397976528 is about 19949.3490620622. The cubic root of 397976528 is about 735.5617763838.

It can be divided in two parts, 3979765 and 28, that added together give a palindrome (3979793).

The spelling of 397976528 in words is "three hundred ninety-seven million, nine hundred seventy-six thousand, five hundred twenty-eight".