45478220 has 12 divisors (see below), whose sum is σ = 95504304. Its totient is φ = 18191280.

The previous prime is 45478211. The next prime is 45478231. The reversal of 45478220 is 2287454.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136936 + ... + 1136975.

It is an arithmetic number, because the mean of its divisors is an integer number (7958692).

Almost surely, 2^45478220 is an apocalyptic number.

It is an amenable number.

45478220 is an abundant number, since it is smaller than the sum of its proper divisors (50026084).

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

45478220 is a wasteful number, since it uses less digits than its factorization.

45478220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273920 (or 2273918 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 45478220 is about 6743.7541473574. The cubic root of 45478220 is about 356.9448766326.

The spelling of 45478220 in words is "forty-five million, four hundred seventy-eight thousand, two hundred twenty".