45640072 has 16 divisors (see below), whose sum is σ = 85962240. Its totient is φ = 22716816.

The previous prime is 45640069. The next prime is 45640079. The reversal of 45640072 is 27004654.

It is a self number, because there is not a number n which added to its sum of digits gives 45640072.

It is not an unprimeable number, because it can be changed into a prime (45640079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11008 + ... + 14575.

It is an arithmetic number, because the mean of its divisors is an integer number (5372640).

Almost surely, 2^45640072 is an apocalyptic number.

It is an amenable number.

45640072 is a deficient number, since it is larger than the sum of its proper divisors (40322168).

45640072 is a wasteful number, since it uses less digits than its factorization.

45640072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25812 (or 25808 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 45640072 is about 6755.7436304229. The cubic root of 45640072 is about 357.3678178583.

The spelling of 45640072 in words is "forty-five million, six hundred forty thousand, seventy-two".