404443980 has 72 divisors (see below), whose sum is σ = 1266405504. Its totient is φ = 104371200.

The previous prime is 404443973. The next prime is 404443981. The reversal of 404443980 is 89344404.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (404443981) 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 23 ways as a sum of consecutive naturals, for example, 30661 + ... + 41820.

Almost surely, 2^404443980 is an apocalyptic number.

It is an amenable number.

404443980 is an abundant number, since it is smaller than the sum of its proper divisors (861961524).

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

404443980 is a wasteful number, since it uses less digits than its factorization.

404443980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72527 (or 72522 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 404443980 is about 20110.7926248569. The cubic root of 404443980 is about 739.5248837196.

The spelling of 404443980 in words is "four hundred four million, four hundred forty-three thousand, nine hundred eighty".