399558880 has 48 divisors (see below), whose sum is σ = 1078812000. Its totient is φ = 136991232.

The previous prime is 399558869. The next prime is 399558883. The reversal of 399558880 is 88855993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399558883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177255 + ... + 179494.

It is an arithmetic number, because the mean of its divisors is an integer number (22475250).

Almost surely, 2^399558880 is an apocalyptic number.

It is an amenable number.

399558880 is an abundant number, since it is smaller than the sum of its proper divisors (679253120).

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

399558880 is a wasteful number, since it uses less digits than its factorization.

399558880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356771 (or 356763 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 55.

The square root of 399558880 is about 19988.9689579028. The cubic root of 399558880 is about 736.5353501068.

The spelling of 399558880 in words is "three hundred ninety-nine million, five hundred fifty-eight thousand, eight hundred eighty".