399134490624 has 408 divisors, whose sum is σ = 1216028503872. Its totient is φ = 130799370240.

The previous prime is 399134490551. The next prime is 399134490637. The reversal of 399134490624 is 426094431993.

399134490624 is a `hidden beast` number, since 3 + 9 + 9 + 1 + 3 + 4 + 4 + 9 + 0 + 624 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1130692432 + ... + 1130692784.

Almost surely, 2^399134490624 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 399134490624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608014251936).

399134490624 is an abundant number, since it is smaller than the sum of its proper divisors (816894013248).

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

399134490624 is an frugal number, since it uses more digits than its factorization.

399134490624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 399134490624 in words is "three hundred ninety-nine billion, one hundred thirty-four million, four hundred ninety thousand, six hundred twenty-four".