399716580 has 48 divisors (see below), whose sum is σ = 1185045120. Its totient is φ = 100320768.

The previous prime is 399716579. The next prime is 399716617. The reversal of 399716580 is 85617993.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194920 + ... + 196959.

It is an arithmetic number, because the mean of its divisors is an integer number (24688440).

Almost surely, 2^399716580 is an apocalyptic number.

399716580 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399716580 is an abundant number, since it is smaller than the sum of its proper divisors (785328540).

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

399716580 is a wasteful number, since it uses less digits than its factorization.

399716580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391908 (or 391906 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 399716580 is about 19992.9132444474. The cubic root of 399716580 is about 736.6322372431.

The spelling of 399716580 in words is "three hundred ninety-nine million, seven hundred sixteen thousand, five hundred eighty".