45799920 has 60 divisors (see below), whose sum is σ = 153813816. Its totient is φ = 12213120.

The previous prime is 45799913. The next prime is 45799933. The reversal of 45799920 is 2999754.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31086 + ... + 32525.

Almost surely, 2^45799920 is an apocalyptic number.

45799920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45799920 is an abundant number, since it is smaller than the sum of its proper divisors (108013896).

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

45799920 is a wasteful number, since it uses less digits than its factorization.

45799920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63630 (or 63621 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 45799920 is about 6767.5638157316. The cubic root of 45799920 is about 357.7845420780.

The spelling of 45799920 in words is "forty-five million, seven hundred ninety-nine thousand, nine hundred twenty".