397840063992 has 64 divisors (see below), whose sum is σ = 1139311246080. Its totient is φ = 113406054912.

The previous prime is 397840063961. The next prime is 397840063997. The reversal of 397840063992 is 299360048793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397840063997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2661778 + ... + 2807265.

It is an arithmetic number, because the mean of its divisors is an integer number (17801738220).

Almost surely, 2^397840063992 is an apocalyptic number.

It is an amenable number.

397840063992 is an abundant number, since it is smaller than the sum of its proper divisors (741471182088).

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

397840063992 is a wasteful number, since it uses less digits than its factorization.

397840063992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5469492 (or 5469488 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 60.

The spelling of 397840063992 in words is "three hundred ninety-seven billion, eight hundred forty million, sixty-three thousand, nine hundred ninety-two".