399680268624 has 1080 divisors, whose sum is σ = 1499631413280. Its totient is φ = 102218070528.

The previous prime is 399680268599. The next prime is 399680268679. The reversal of 399680268624 is 426862086993.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 2875397547 + ... + 2875397685.

Almost surely, 2^399680268624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399680268624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749815706640).

399680268624 is an abundant number, since it is smaller than the sum of its proper divisors (1099951144656).

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

399680268624 is a wasteful number, since it uses less digits than its factorization.

399680268624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 63.

The spelling of 399680268624 in words is "three hundred ninety-nine billion, six hundred eighty million, two hundred sixty-eight thousand, six hundred twenty-four".