399632016 has 160 divisors (see below), whose sum is σ = 1264204800. Its totient is φ = 106237440.

The previous prime is 399632011. The next prime is 399632021. The reversal of 399632016 is 610236993.

It is an interprime number because it is at equal distance from previous prime (399632011) and next prime (399632021).

It is a super-4 number, since 4×399632016⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (399632011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 376126 + ... + 377186.

It is an arithmetic number, because the mean of its divisors is an integer number (7901280).

Almost surely, 2^399632016 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 399632016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (632102400).

399632016 is an abundant number, since it is smaller than the sum of its proper divisors (864572784).

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

399632016 is a wasteful number, since it uses less digits than its factorization.

399632016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1151 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 399632016 is about 19990.7982832102. The cubic root of 399632016 is about 736.5802862983.

The spelling of 399632016 in words is "three hundred ninety-nine million, six hundred thirty-two thousand, sixteen".