399107120 has 80 divisors (see below), whose sum is σ = 956188800. Its totient is φ = 154828800.

The previous prime is 399107101. The next prime is 399107129. The reversal of 399107120 is 21701993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (399107129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 888656 + ... + 889104.

It is an arithmetic number, because the mean of its divisors is an integer number (11952360).

Almost surely, 2^399107120 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 399107120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478094400).

399107120 is an abundant number, since it is smaller than the sum of its proper divisors (557081680).

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

399107120 is a wasteful number, since it uses less digits than its factorization.

399107120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 399107120 is about 19977.6655292854. The cubic root of 399107120 is about 736.2576582921.

The spelling of 399107120 in words is "three hundred ninety-nine million, one hundred seven thousand, one hundred twenty".