397932528 has 120 divisors (see below), whose sum is σ = 1209900240. Its totient is φ = 112358400.

The previous prime is 397932487. The next prime is 397932547. The reversal of 397932528 is 825239793.

It is a happy number.

397932528 is nontrivially palindromic in base 13.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 208378 + ... + 210278.

It is an arithmetic number, because the mean of its divisors is an integer number (10082502).

Almost surely, 2^397932528 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 397932528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604950120).

397932528 is an abundant number, since it is smaller than the sum of its proper divisors (811967712).

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

397932528 is a wasteful number, since it uses less digits than its factorization.

397932528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015 (or 2002 counting only the distinct ones).

The product of its digits is 816480, while the sum is 48.

The square root of 397932528 is about 19948.2462387048. The cubic root of 397932528 is about 735.5346676569.

The spelling of 397932528 in words is "three hundred ninety-seven million, nine hundred thirty-two thousand, five hundred twenty-eight".