45099920 has 40 divisors (see below), whose sum is σ = 110379840. Its totient is φ = 17089920.

The previous prime is 45099919. The next prime is 45099953. The reversal of 45099920 is 2999054.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (38).

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, 13316 + ... + 16355.

It is an arithmetic number, because the mean of its divisors is an integer number (2759496).

Almost surely, 2^45099920 is an apocalyptic number.

45099920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45099920 is an abundant number, since it is smaller than the sum of its proper divisors (65279920).

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

45099920 is a wasteful number, since it uses less digits than its factorization.

45099920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29703 (or 29697 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 45099920 is about 6715.6473999161. The cubic root of 45099920 is about 355.9523986348.

The spelling of 45099920 in words is "forty-five million, ninety-nine thousand, nine hundred twenty".