22044420 has 48 divisors (see below), whose sum is σ = 68584320. Its totient is φ = 5878368.

The previous prime is 22044413. The next prime is 22044433. The reversal of 22044420 is 2444022.

22044420 is a `hidden beast` number, since 220 + 4 + 442 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22044393 and 22044402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19872 + ... + 20951.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^22044420 is an apocalyptic number.

22044420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22044420 is an abundant number, since it is smaller than the sum of its proper divisors (46539900).

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

22044420 is a wasteful number, since it uses less digits than its factorization.

22044420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40841 (or 40833 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 22044420 is about 4695.1485599499. The cubic root of 22044420 is about 280.3923920218.

Adding to 22044420 its reverse (2444022), we get a palindrome (24488442).

The spelling of 22044420 in words is "twenty-two million, forty-four thousand, four hundred twenty".