399088512 has 128 divisors (see below), whose sum is σ = 1210087200. Its totient is φ = 129392640.

The previous prime is 399088507. The next prime is 399088519. The reversal of 399088512 is 215880993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399088519) 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, 126312 + ... + 129432.

Almost surely, 2^399088512 is an apocalyptic number.

399088512 is a gapful number since it is divisible by the number (32) 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 399088512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (605043600).

399088512 is an abundant number, since it is smaller than the sum of its proper divisors (810998688).

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

399088512 is a wasteful number, since it uses less digits than its factorization.

399088512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181 (or 3163 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 399088512 is about 19977.1998037763. The cubic root of 399088512 is about 736.2462156704.

The spelling of 399088512 in words is "three hundred ninety-nine million, eighty-eight thousand, five hundred twelve".