45645972 has 12 divisors (see below), whose sum is σ = 106507296. Its totient is φ = 15215320.

The previous prime is 45645967. The next prime is 45645973. The reversal of 45645972 is 27954654.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45645973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1901904 + ... + 1901927.

It is an arithmetic number, because the mean of its divisors is an integer number (8875608).

Almost surely, 2^45645972 is an apocalyptic number.

It is an amenable number.

45645972 is an abundant number, since it is smaller than the sum of its proper divisors (60861324).

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

45645972 is a wasteful number, since it uses less digits than its factorization.

45645972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803838 (or 3803836 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 45645972 is about 6756.1802817864. The cubic root of 45645972 is about 357.3832164557.

The spelling of 45645972 in words is "forty-five million, six hundred forty-five thousand, nine hundred seventy-two".