397138945480 has 32 divisors (see below), whose sum is σ = 946125136440. Its totient is φ = 149511132160.

The previous prime is 397138945477. The next prime is 397138945523. The reversal of 397138945480 is 84549831793.

It can be written as a sum of positive squares in 4 ways, for example, as 391818410116 + 5320535364 = 625954^2 + 72942^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292013251 + ... + 292014610.

Almost surely, 2^397138945480 is an apocalyptic number.

It is an amenable number.

397138945480 is an abundant number, since it is smaller than the sum of its proper divisors (548986190960).

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

397138945480 is a wasteful number, since it uses less digits than its factorization.

397138945480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584027889 (or 584027885 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 397138945480 in words is "three hundred ninety-seven billion, one hundred thirty-eight million, nine hundred forty-five thousand, four hundred eighty".