393319980 has 72 divisors (see below), whose sum is σ = 1195517232. Its totient is φ = 104670336.

The previous prime is 393319963. The next prime is 393319981. The reversal of 393319980 is 89913393.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (393319981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98299 + ... + 102221.

It is an arithmetic number, because the mean of its divisors is an integer number (16604406).

Almost surely, 2^393319980 is an apocalyptic number.

393319980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

393319980 is an abundant number, since it is smaller than the sum of its proper divisors (802197252).

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

393319980 is a wasteful number, since it uses less digits than its factorization.

393319980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495 (or 4490 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 393319980 is about 19832.2963874585. The cubic root of 393319980 is about 732.6816860332.

The spelling of 393319980 in words is "three hundred ninety-three million, three hundred nineteen thousand, nine hundred eighty".