397997707932 has 36 divisors (see below), whose sum is σ = 1097508832056. Its totient is φ = 120605365920.

The previous prime is 397997707931. The next prime is 397997707937. The reversal of 397997707932 is 239707799793.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397997707931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 502521963 + ... + 502522754.

It is an arithmetic number, because the mean of its divisors is an integer number (30486356446).

Almost surely, 2^397997707932 is an apocalyptic number.

It is an amenable number.

397997707932 is an abundant number, since it is smaller than the sum of its proper divisors (699511124124).

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

397997707932 is a wasteful number, since it uses less digits than its factorization.

397997707932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005044738 (or 1005044733 counting only the distinct ones).

The product of its (nonzero) digits is 283553298, while the sum is 72.

The spelling of 397997707932 in words is "three hundred ninety-seven billion, nine hundred ninety-seven million, seven hundred seven thousand, nine hundred thirty-two".