22240404 has 72 divisors (see below), whose sum is σ = 58924320. Its totient is φ = 7065792.

The previous prime is 22240397. The next prime is 22240429. The reversal of 22240404 is 40404222.

22240404 is a `hidden beast` number, since 22 + 240 + 404 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78447 + ... + 78729.

Almost surely, 2^22240404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22240404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29462160).

22240404 is an abundant number, since it is smaller than the sum of its proper divisors (36683916).

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

22240404 is a wasteful number, since it uses less digits than its factorization.

22240404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 384 counting only the distinct ones).

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

The square root of 22240404 is about 4715.9732823671. The cubic root of 22240404 is about 281.2208763917.

Adding to 22240404 its reverse (40404222), we get a palindrome (62644626).

The spelling of 22240404 in words is "twenty-two million, two hundred forty thousand, four hundred four".