22404388 has 12 divisors (see below), whose sum is σ = 40267612. Its totient is φ = 10899360.

The previous prime is 22404367. The next prime is 22404391. The reversal of 22404388 is 88340422.

It can be written as a sum of positive squares in 2 ways, for example, as 16064064 + 6340324 = 4008^2 + 2518^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 75543 + ... + 75838.

Almost surely, 2^22404388 is an apocalyptic number.

It is an amenable number.

22404388 is a deficient number, since it is larger than the sum of its proper divisors (17863224).

22404388 is a wasteful number, since it uses less digits than its factorization.

22404388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151422 (or 151420 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 22404388 is about 4733.3273708883. The cubic root of 22404388 is about 281.9103549539.

The spelling of 22404388 in words is "twenty-two million, four hundred four thousand, three hundred eighty-eight".