399662420384 has 96 divisors (see below), whose sum is σ = 810080409600. Its totient is φ = 194033968128.

The previous prime is 399662420357. The next prime is 399662420387. The reversal of 399662420384 is 483024266993.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (399662420387) 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, 42744542 + ... + 42753890.

It is an arithmetic number, because the mean of its divisors is an integer number (8438337600).

Almost surely, 2^399662420384 is an apocalyptic number.

It is an amenable number.

399662420384 is an abundant number, since it is smaller than the sum of its proper divisors (410417989216).

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

399662420384 is a wasteful number, since it uses less digits than its factorization.

399662420384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9710 (or 9702 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 56.

The spelling of 399662420384 in words is "three hundred ninety-nine billion, six hundred sixty-two million, four hundred twenty thousand, three hundred eighty-four".