397918310000 has 50 divisors (see below), whose sum is σ = 963400044552. Its totient is φ = 159167320000.

The previous prime is 397918309991. The next prime is 397918310039. The reversal of 397918310000 is 13819793.

It is a tau number, because it is divible by the number of its divisors (50).

It is a super-2 number, since 2×397918310000² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397918310000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19885916 + ... + 19905915.

Almost surely, 2^397918310000 is an apocalyptic number.

It is an amenable number.

397918310000 is an abundant number, since it is smaller than the sum of its proper divisors (565481734552).

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

397918310000 is an equidigital number, since it uses as much as digits as its factorization.

397918310000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39791859 (or 39791838 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 397918310000 in words is "three hundred ninety-seven billion, nine hundred eighteen million, three hundred ten thousand".