397706639445732 has 24 divisors (see below), whose sum is σ = 930135249574272. Its totient is φ = 132261295405600.

The previous prime is 397706639445673. The next prime is 397706639445757. The reversal of 397706639445732 is 237544936607793.

It is a happy number.

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, 38448045819 + ... + 38448056162.

It is an arithmetic number, because the mean of its divisors is an integer number (38755635398928).

Almost surely, 2^{397706639445732} is an apocalyptic number.

It is an amenable number.

397706639445732 is an abundant number, since it is smaller than the sum of its proper divisors (532428610128540).

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

397706639445732 is a wasteful number, since it uses less digits than its factorization.

397706639445732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76896102419 (or 76896102417 counting only the distinct ones).

The product of its (nonzero) digits is 4320812160, while the sum is 75.

The spelling of 397706639445732 in words is "three hundred ninety-seven trillion, seven hundred six billion, six hundred thirty-nine million, four hundred forty-five thousand, seven hundred thirty-two".