399831696 has 60 divisors (see below), whose sum is σ = 1220703120. Its totient is φ = 121160640.

The previous prime is 399831689. The next prime is 399831697. The reversal of 399831696 is 696138993.

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

It is not an unprimeable number, because it can be changed into a prime (399831697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124626 + ... + 127793.

It is an arithmetic number, because the mean of its divisors is an integer number (20345052).

Almost surely, 2^399831696 is an apocalyptic number.

399831696 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

399831696 is an abundant number, since it is smaller than the sum of its proper divisors (820871424).

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

399831696 is a wasteful number, since it uses less digits than its factorization.

399831696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252444 (or 252435 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 399831696 is about 19995.7919573094. The cubic root of 399831696 is about 736.7029456914.

The spelling of 399831696 in words is "three hundred ninety-nine million, eight hundred thirty-one thousand, six hundred ninety-six".