45129978 has 24 divisors (see below), whose sum is σ = 102928800. Its totient is φ = 14251464.

The previous prime is 45129967. The next prime is 45129989. The reversal of 45129978 is 87992154.

It is an interprime number because it is at equal distance from previous prime (45129967) and next prime (45129989).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65638 + ... + 66321.

It is an arithmetic number, because the mean of its divisors is an integer number (4288700).

Almost surely, 2^45129978 is an apocalyptic number.

45129978 is an abundant number, since it is smaller than the sum of its proper divisors (57798822).

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

45129978 is a wasteful number, since it uses less digits than its factorization.

45129978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131986 (or 131983 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 45129978 is about 6717.8849350074. The cubic root of 45129978 is about 356.0314589462.

The spelling of 45129978 in words is "forty-five million, one hundred twenty-nine thousand, nine hundred seventy-eight".