22440180 has 144 divisors (see below), whose sum is σ = 75809664. Its totient is φ = 4857600.

The previous prime is 22440179. The next prime is 22440239. The reversal of 22440180 is 8104422.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 222130 + ... + 222230.

It is an arithmetic number, because the mean of its divisors is an integer number (526456).

Almost surely, 2^22440180 is an apocalyptic number.

22440180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22440180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37904832).

22440180 is an abundant number, since it is smaller than the sum of its proper divisors (53369484).

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

22440180 is a wasteful number, since it uses less digits than its factorization.

22440180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 22440180 is about 4737.1067119076. The cubic root of 22440180 is about 282.0603965000.

It can be divided in two parts, 224 and 40180, that added together give a palindrome (40404).

The spelling of 22440180 in words is "twenty-two million, four hundred forty thousand, one hundred eighty".