397630722328 has 16 divisors (see below), whose sum is σ = 852065833680. Its totient is φ = 170413166688.

The previous prime is 397630722319. The next prime is 397630722427. The reversal of 397630722328 is 823227036793.

It is a super-2 number, since 2×397630722328² (a number of 24 digits) contains 22 as substring.

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, 3550274251 + ... + 3550274362.

It is an arithmetic number, because the mean of its divisors is an integer number (53254114605).

Almost surely, 2^397630722328 is an apocalyptic number.

It is an amenable number.

397630722328 is an abundant number, since it is smaller than the sum of its proper divisors (454435111352).

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

397630722328 is a wasteful number, since it uses less digits than its factorization.

397630722328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7100548626 (or 7100548622 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 52.

The spelling of 397630722328 in words is "three hundred ninety-seven billion, six hundred thirty million, seven hundred twenty-two thousand, three hundred twenty-eight".