399055488 has 64 divisors (see below), whose sum is σ = 1141543200. Its totient is φ = 122784768.

The previous prime is 399055487. The next prime is 399055493. The reversal of 399055488 is 884550993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 399055488.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399055487) 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, 34978 + ... + 44961.

Almost surely, 2^399055488 is an apocalyptic number.

It is an amenable number.

399055488 is an abundant number, since it is smaller than the sum of its proper divisors (742487712).

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

399055488 is a wasteful number, since it uses less digits than its factorization.

399055488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79969 (or 79957 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 399055488 is about 19976.3732444105. The cubic root of 399055488 is about 736.2259073386.

The spelling of 399055488 in words is "three hundred ninety-nine million, fifty-five thousand, four hundred eighty-eight".