397388628 has 324 divisors, whose sum is σ = 1336503168. Its totient is φ = 99066240.

The previous prime is 397388627. The next prime is 397388669. The reversal of 397388628 is 826883793.

397388628 is a `hidden beast` number, since 3 + 9 + 7 + 3 + 8 + 8 + 628 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397388627) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 9241575 + ... + 9241617.

Almost surely, 2^397388628 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 397388628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668251584).

397388628 is an abundant number, since it is smaller than the sum of its proper divisors (939114540).

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

397388628 is a wasteful number, since it uses less digits than its factorization.

397388628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 99 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 397388628 is about 19934.6087997733. The cubic root of 397388628 is about 735.1994016808.

The spelling of 397388628 in words is "three hundred ninety-seven million, three hundred eighty-eight thousand, six hundred twenty-eight".