45519920 has 20 divisors (see below), whose sum is σ = 105834000. Its totient is φ = 18207936.

The previous prime is 45519919. The next prime is 45519941. The reversal of 45519920 is 2991554.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284420 + ... + 284579.

It is an arithmetic number, because the mean of its divisors is an integer number (5291700).

Almost surely, 2^45519920 is an apocalyptic number.

45519920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45519920 is an abundant number, since it is smaller than the sum of its proper divisors (60314080).

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

45519920 is a wasteful number, since it uses less digits than its factorization.

45519920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569012 (or 569006 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 45519920 is about 6746.8451886789. The cubic root of 45519920 is about 357.0539402263.

The spelling of 45519920 in words is "forty-five million, five hundred nineteen thousand, nine hundred twenty".