45720978 has 16 divisors (see below), whose sum is σ = 91847520. Its totient is φ = 15172736.

The previous prime is 45720977. The next prime is 45721009. The reversal of 45720978 is 87902754.

45720978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45720971) 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, 15423 + ... + 18146.

It is an arithmetic number, because the mean of its divisors is an integer number (5740470).

Almost surely, 2^45720978 is an apocalyptic number.

45720978 is an abundant number, since it is smaller than the sum of its proper divisors (46126542).

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

45720978 is a wasteful number, since it uses less digits than its factorization.

45720978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33801.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 45720978 is about 6761.7289209196. The cubic root of 45720978 is about 357.5788614393.

The spelling of 45720978 in words is "forty-five million, seven hundred twenty thousand, nine hundred seventy-eight".