396731986542 has 48 divisors (see below), whose sum is σ = 863760343680. Its totient is φ = 131603187456.

The previous prime is 396731986529. The next prime is 396731986591. The reversal of 396731986542 is 245689137693.

396731986542 is a `hidden beast` number, since 3 + 9 + 6 + 7 + 3 + 1 + 9 + 86 + 542 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 396731986542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3361834 + ... + 3477842.

It is an arithmetic number, because the mean of its divisors is an integer number (17995007160).

Almost surely, 2^396731986542 is an apocalyptic number.

396731986542 is an abundant number, since it is smaller than the sum of its proper divisors (467028357138).

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

396731986542 is a wasteful number, since it uses less digits than its factorization.

396731986542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116937 (or 116934 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The spelling of 396731986542 in words is "three hundred ninety-six billion, seven hundred thirty-one million, nine hundred eighty-six thousand, five hundred forty-two".