220644432 has 40 divisors (see below), whose sum is σ = 633332480. Its totient is φ = 73548000.

The previous prime is 220644421. The next prime is 220644433. The reversal of 220644432 is 234446022.

220644432 is a `hidden beast` number, since 220 + 6 + 4 + 4 + 432 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 220644396 and 220644405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220644433) 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 7 ways as a sum of consecutive naturals, for example, 254944 + ... + 255807.

It is an arithmetic number, because the mean of its divisors is an integer number (15833312).

Almost surely, 2^220644432 is an apocalyptic number.

It is an amenable number.

220644432 is an abundant number, since it is smaller than the sum of its proper divisors (412688048).

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

220644432 is a wasteful number, since it uses less digits than its factorization.

220644432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510768 (or 510756 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 220644432 is about 14854.1048872021. The cubic root of 220644432 is about 604.2699405944.

The spelling of 220644432 in words is "two hundred twenty million, six hundred forty-four thousand, four hundred thirty-two".