22447988 has 6 divisors (see below), whose sum is σ = 39283986. Its totient is φ = 11223992.

The previous prime is 22447981. The next prime is 22447993. The reversal of 22447988 is 88974422.

It can be written as a sum of positive squares in only one way, i.e., 12475024 + 9972964 = 3532^2 + 3158^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22447981) by changing a digit.

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 as a sum of consecutive naturals, namely, 2805995 + ... + 2806002.

It is an arithmetic number, because the mean of its divisors is an integer number (6547331).

Almost surely, 2^22447988 is an apocalyptic number.

It is an amenable number.

22447988 is a deficient number, since it is larger than the sum of its proper divisors (16835998).

22447988 is a wasteful number, since it uses less digits than its factorization.

22447988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5612001 (or 5611999 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 22447988 is about 4737.9307719721. The cubic root of 22447988 is about 282.0931067574.

The spelling of 22447988 in words is "twenty-two million, four hundred forty-seven thousand, nine hundred eighty-eight".