399112704 has 80 divisors (see below), whose sum is σ = 1181442240. Its totient is φ = 133032960.

The previous prime is 399112699. The next prime is 399112709. The reversal of 399112704 is 407211993.

It is an interprime number because it is at equal distance from previous prime (399112699) and next prime (399112709).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399112709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612 + ... + 28259.

It is an arithmetic number, because the mean of its divisors is an integer number (14768028).

Almost surely, 2^399112704 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 399112704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (590721120).

399112704 is an abundant number, since it is smaller than the sum of its proper divisors (782329536).

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

399112704 is an equidigital number, since it uses as much as digits as its factorization.

399112704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28898 (or 28876 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 399112704 is about 19977.8052848655. The cubic root of 399112704 is about 736.2610919932.

The spelling of 399112704 in words is "three hundred ninety-nine million, one hundred twelve thousand, seven hundred four".