399579336 has 192 divisors, whose sum is σ = 1232824320. Its totient is φ = 116052480.

The previous prime is 399579307. The next prime is 399579337. The reversal of 399579336 is 633975993.

399579336 is a `hidden beast` number, since 39 + 9 + 579 + 3 + 36 = 666.

It is not an unprimeable number, because it can be changed into a prime (399579337) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1363606 + ... + 1363898.

It is an arithmetic number, because the mean of its divisors is an integer number (6420960).

Almost surely, 2^399579336 is an apocalyptic number.

399579336 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399579336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616412160).

399579336 is an abundant number, since it is smaller than the sum of its proper divisors (833244984).

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

399579336 is a wasteful number, since it uses less digits than its factorization.

399579336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 389 counting only the distinct ones).

The product of its digits is 4133430, while the sum is 54.

The square root of 399579336 is about 19989.4806335732. The cubic root of 399579336 is about 736.5479192264.

The spelling of 399579336 in words is "three hundred ninety-nine million, five hundred seventy-nine thousand, three hundred thirty-six".