399732336 has 120 divisors (see below), whose sum is σ = 1185239120. Its totient is φ = 125411328.

The previous prime is 399732313. The next prime is 399732379. The reversal of 399732336 is 633237993.

It is a junction number, because it is equal to n+sod(n) for n = 399732291 and 399732300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 527670 + ... + 528426.

Almost surely, 2^399732336 is an apocalyptic number.

399732336 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 399732336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592619560).

399732336 is an abundant number, since it is smaller than the sum of its proper divisors (785506784).

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

399732336 is a wasteful number, since it uses less digits than its factorization.

399732336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983 (or 974 counting only the distinct ones).

The product of its digits is 551124, while the sum is 45.

The square root of 399732336 is about 19993.3072801875. The cubic root of 399732336 is about 736.6419159551.

The spelling of 399732336 in words is "three hundred ninety-nine million, seven hundred thirty-two thousand, three hundred thirty-six".