445839980 has 12 divisors (see below), whose sum is σ = 936264000. Its totient is φ = 178335984.

The previous prime is 445839937. The next prime is 445839983. The reversal of 445839980 is 89938544.

It is a happy number.

It is a hoax number, since the sum of its digits (50) 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 (445839983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11145980 + ... + 11146019.

It is an arithmetic number, because the mean of its divisors is an integer number (78022000).

Almost surely, 2^445839980 is an apocalyptic number.

It is an amenable number.

445839980 is an abundant number, since it is smaller than the sum of its proper divisors (490424020).

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

445839980 is a wasteful number, since it uses less digits than its factorization.

445839980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22292008 (or 22292006 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 445839980 is about 21114.9231587520. The cubic root of 445839980 is about 763.9407385299.

The spelling of 445839980 in words is "four hundred forty-five million, eight hundred thirty-nine thousand, nine hundred eighty".