45207920 has 40 divisors (see below), whose sum is σ = 108504960. Its totient is φ = 17498880.

The previous prime is 45207919. The next prime is 45207959. The reversal of 45207920 is 2970254.

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

It is a congruent number.

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, 6635 + ... + 11594.

It is an arithmetic number, because the mean of its divisors is an integer number (2712624).

Almost surely, 2^45207920 is an apocalyptic number.

45207920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45207920 is an abundant number, since it is smaller than the sum of its proper divisors (63297040).

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

45207920 is a wasteful number, since it uses less digits than its factorization.

45207920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18273 (or 18267 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 45207920 is about 6723.6835142651. The cubic root of 45207920 is about 356.2363031566.

The spelling of 45207920 in words is "forty-five million, two hundred seven thousand, nine hundred twenty".