22312404 has 36 divisors (see below), whose sum is σ = 57605184. Its totient is φ = 7278672.

The previous prime is 22312393. The next prime is 22312421. The reversal of 22312404 is 40421322.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×22312404³ (a number of 23 digits) contains 333 as substring.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4902 + ... + 8285.

It is an arithmetic number, because the mean of its divisors is an integer number (1600144).

Almost surely, 2^22312404 is an apocalyptic number.

It is an amenable number.

22312404 is an abundant number, since it is smaller than the sum of its proper divisors (35292780).

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

22312404 is a wasteful number, since it uses less digits than its factorization.

22312404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13244 (or 13239 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22312404 is about 4723.6007451943. The cubic root of 22312404 is about 281.5240197527.

Adding to 22312404 its reverse (40421322), we get a palindrome (62733726).

The spelling of 22312404 in words is "twenty-two million, three hundred twelve thousand, four hundred four".