399067631524 has 81 divisors (see below), whose sum is σ = 756068812779. Its totient is φ = 184284774960.

The previous prime is 399067631497. The next prime is 399067631533. The reversal of 399067631524 is 425136760993.

The square root of 399067631524 is 631718.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 900829647 + ... + 900830089.

Almost surely, 2^399067631524 is an apocalyptic number.

399067631524 is the 631718-th square number.

It is an amenable number.

399067631524 is a deficient number, since it is larger than the sum of its proper divisors (357001181255).

399067631524 is an equidigital number, since it uses as much as digits as its factorization.

399067631524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 55.

The spelling of 399067631524 in words is "three hundred ninety-nine billion, sixty-seven million, six hundred thirty-one thousand, five hundred twenty-four".