45120820 has 24 divisors (see below), whose sum is σ = 99741600. Its totient is φ = 17098272.

The previous prime is 45120809. The next prime is 45120827. The reversal of 45120820 is 2802154.

45120820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 45120791 and 45120800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45120827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58990 + ... + 59749.

It is an arithmetic number, because the mean of its divisors is an integer number (4155900).

Almost surely, 2^45120820 is an apocalyptic number.

It is an amenable number.

45120820 is an abundant number, since it is smaller than the sum of its proper divisors (54620780).

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

45120820 is a wasteful number, since it uses less digits than its factorization.

45120820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118767 (or 118765 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 45120820 is about 6717.2032870831. The cubic root of 45120820 is about 356.0073747578.

Adding to 45120820 its reverse (2802154), we get a palindrome (47922974).

The spelling of 45120820 in words is "forty-five million, one hundred twenty thousand, eight hundred twenty".