399823632 has 120 divisors (see below), whose sum is σ = 1233296064. Its totient is φ = 120137472.

The previous prime is 399823603. The next prime is 399823687. The reversal of 399823632 is 236328993.

399823632 is a `hidden beast` number, since 3 + 9 + 9 + 8 + 2 + 3 + 632 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78013 + ... + 82979.

Almost surely, 2^399823632 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 399823632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616648032).

399823632 is an abundant number, since it is smaller than the sum of its proper divisors (833472432).

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

399823632 is a wasteful number, since it uses less digits than its factorization.

399823632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5037 (or 5028 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 399823632 is about 19995.5903138667. The cubic root of 399823632 is about 736.6979929304.

The spelling of 399823632 in words is "three hundred ninety-nine million, eight hundred twenty-three thousand, six hundred thirty-two".