45545920 has 56 divisors (see below), whose sum is σ = 123956064. Its totient is φ = 15614976.

The previous prime is 45545909. The next prime is 45545939. The reversal of 45545920 is 2954554.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7927 + ... + 12406.

Almost surely, 2^45545920 is an apocalyptic number.

45545920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45545920 is an abundant number, since it is smaller than the sum of its proper divisors (78410144).

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

45545920 is a wasteful number, since it uses less digits than its factorization.

45545920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20357 (or 20347 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 45545920 is about 6748.7717401020. The cubic root of 45545920 is about 357.1219077997.

The spelling of 45545920 in words is "forty-five million, five hundred forty-five thousand, nine hundred twenty".