45155820 has 48 divisors (see below), whose sum is σ = 126766080. Its totient is φ = 12010176.

The previous prime is 45155783. The next prime is 45155833. The reversal of 45155820 is 2855154.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30661 + ... + 32099.

It is an arithmetic number, because the mean of its divisors is an integer number (2640960).

Almost surely, 2^45155820 is an apocalyptic number.

It is an amenable number.

45155820 is an abundant number, since it is smaller than the sum of its proper divisors (81610260).

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

45155820 is a wasteful number, since it uses less digits than its factorization.

45155820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974 (or 1972 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 45155820 is about 6719.8080329724. The cubic root of 45155820 is about 356.0994020283.

The spelling of 45155820 in words is "forty-five million, one hundred fifty-five thousand, eight hundred twenty".