399335980 has 24 divisors (see below), whose sum is σ = 841957200. Its totient is φ = 159096000.

The previous prime is 399335953. The next prime is 399335983. The reversal of 399335980 is 89533993.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (399335983) 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, 34755 + ... + 44794.

It is an arithmetic number, because the mean of its divisors is an integer number (35081550).

Almost surely, 2^399335980 is an apocalyptic number.

It is an amenable number.

399335980 is an abundant number, since it is smaller than the sum of its proper divisors (442621220).

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

399335980 is a wasteful number, since it uses less digits than its factorization.

399335980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79809 (or 79807 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 49.

The square root of 399335980 is about 19983.3926048607. The cubic root of 399335980 is about 736.3983621465.

The spelling of 399335980 in words is "three hundred ninety-nine million, three hundred thirty-five thousand, nine hundred eighty".