399475788 has 24 divisors (see below), whose sum is σ = 942585840. Its totient is φ = 131662080.

The previous prime is 399475771. The next prime is 399475789. The reversal of 399475788 is 887574993.

It is not an unprimeable number, because it can be changed into a prime (399475789) 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, 185953 + ... + 188088.

It is an arithmetic number, because the mean of its divisors is an integer number (39274410).

Almost surely, 2^399475788 is an apocalyptic number.

It is an amenable number.

399475788 is an abundant number, since it is smaller than the sum of its proper divisors (543110052).

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

399475788 is a wasteful number, since it uses less digits than its factorization.

399475788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374137 (or 374135 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 60.

The square root of 399475788 is about 19986.8904034620. The cubic root of 399475788 is about 736.4842900993.

The spelling of 399475788 in words is "three hundred ninety-nine million, four hundred seventy-five thousand, seven hundred eighty-eight".