399849696 has 72 divisors (see below), whose sum is σ = 1179209304. Its totient is φ = 133280640.

The previous prime is 399849679. The next prime is 399849701. The reversal of 399849696 is 696948993.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17935 + ... + 33486.

It is an arithmetic number, because the mean of its divisors is an integer number (16377907).

Almost surely, 2^399849696 is an apocalyptic number.

399849696 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

399849696 is an abundant number, since it is smaller than the sum of its proper divisors (779359608).

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

399849696 is an equidigital number, since it uses as much as digits as its factorization.

399849696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51446 (or 51426 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 63.

The square root of 399849696 is about 19996.2420469447. The cubic root of 399849696 is about 736.7140007213.

The spelling of 399849696 in words is "three hundred ninety-nine million, eight hundred forty-nine thousand, six hundred ninety-six".