399436632 has 144 divisors (see below), whose sum is σ = 1288184040. Its totient is φ = 111428352.

The previous prime is 399436627. The next prime is 399436649. The reversal of 399436632 is 236634993.

399436632 is a `hidden beast` number, since 3 + 9 + 9 + 4 + 3 + 6 + 632 = 666.

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 35 ways as a sum of consecutive naturals, for example, 150388 + ... + 153020.

Almost surely, 2^399436632 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 399436632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (644092020).

399436632 is an abundant number, since it is smaller than the sum of its proper divisors (888747408).

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

399436632 is a wasteful number, since it uses less digits than its factorization.

399436632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702 (or 2688 counting only the distinct ones).

The product of its digits is 629856, while the sum is 45.

The square root of 399436632 is about 19985.9108373874. The cubic root of 399436632 is about 736.4602262954.

The spelling of 399436632 in words is "three hundred ninety-nine million, four hundred thirty-six thousand, six hundred thirty-two".