399594384 has 200 divisors, whose sum is σ = 1400053248. Its totient is φ = 107412480.

The previous prime is 399594373. The next prime is 399594397. The reversal of 399594384 is 483495993.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 399594384.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 152929 + ... + 155519.

Almost surely, 2^399594384 is an apocalyptic number.

399594384 is a gapful number since it is divisible by the number (34) 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 399594384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (700026624).

399594384 is an abundant number, since it is smaller than the sum of its proper divisors (1000458864).

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

399594384 is a wasteful number, since it uses less digits than its factorization.

399594384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635 (or 2620 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 399594384 is about 19989.8570280030. The cubic root of 399594384 is about 736.5571651449.

The spelling of 399594384 in words is "three hundred ninety-nine million, five hundred ninety-four thousand, three hundred eighty-four".