45509980 has 24 divisors (see below), whose sum is σ = 95745888. Its totient is φ = 18170688.

The previous prime is 45509929. The next prime is 45509983. The reversal of 45509980 is 8990554.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45509983) 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, 11182 + ... + 14698.

It is an arithmetic number, because the mean of its divisors is an integer number (3989412).

Almost surely, 2^45509980 is an apocalyptic number.

It is an amenable number.

45509980 is an abundant number, since it is smaller than the sum of its proper divisors (50235908).

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

45509980 is a wasteful number, since it uses less digits than its factorization.

45509980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173 (or 4171 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 45509980 is about 6746.1085078733. The cubic root of 45509980 is about 357.0279488616.

The spelling of 45509980 in words is "forty-five million, five hundred nine thousand, nine hundred eighty".