22147904 has 56 divisors (see below), whose sum is σ = 46329600. Its totient is φ = 10492416.

The previous prime is 22147903. The next prime is 22147907. The reversal of 22147904 is 40974122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22147903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111197 + ... + 111395.

Almost surely, 2^22147904 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 22147904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23164800).

22147904 is an abundant number, since it is smaller than the sum of its proper divisors (24181696).

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

22147904 is a wasteful number, since it uses less digits than its factorization.

22147904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 22147904 is about 4706.1559685161. The cubic root of 22147904 is about 280.8304596520.

The spelling of 22147904 in words is "twenty-two million, one hundred forty-seven thousand, nine hundred four".