397837628 has 6 divisors (see below), whose sum is σ = 696215856. Its totient is φ = 198918812.

The previous prime is 397837619. The next prime is 397837633. The reversal of 397837628 is 826738793.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 397837628.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49729700 + ... + 49729707.

It is an arithmetic number, because the mean of its divisors is an integer number (116035976).

Almost surely, 2^397837628 is an apocalyptic number.

It is an amenable number.

397837628 is a deficient number, since it is larger than the sum of its proper divisors (298378228).

397837628 is a wasteful number, since it uses less digits than its factorization.

397837628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99459411 (or 99459409 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 53.

The square root of 397837628 is about 19945.8674416532. The cubic root of 397837628 is about 735.4761922583.

The spelling of 397837628 in words is "three hundred ninety-seven million, eight hundred thirty-seven thousand, six hundred twenty-eight".