45644778 has 24 divisors (see below), whose sum is σ = 100152000. Its totient is φ = 15021864.

The previous prime is 45644749. The next prime is 45644789. The reversal of 45644778 is 87744654.

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, 14628 + ... + 17471.

It is an arithmetic number, because the mean of its divisors is an integer number (4173000).

Almost surely, 2^45644778 is an apocalyptic number.

45644778 is an abundant number, since it is smaller than the sum of its proper divisors (54507222).

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

45644778 is a wasteful number, since it uses less digits than its factorization.

45644778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32186 (or 32183 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 45644778 is about 6756.0919176696. The cubic root of 45644778 is about 357.3801003043.

The spelling of 45644778 in words is "forty-five million, six hundred forty-four thousand, seven hundred seventy-eight".