22149904 has 20 divisors (see below), whose sum is σ = 49046464. Its totient is φ = 9492768.

The previous prime is 22149901. The next prime is 22149923. The reversal of 22149904 is 40994122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22149901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98772 + ... + 98995.

Almost surely, 2^22149904 is an apocalyptic number.

It is an amenable number.

22149904 is an abundant number, since it is smaller than the sum of its proper divisors (26896560).

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

22149904 is a wasteful number, since it uses less digits than its factorization.

22149904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197782 (or 197776 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 22149904 is about 4706.3684513646. The cubic root of 22149904 is about 280.8389125815.

The spelling of 22149904 in words is "twenty-two million, one hundred forty-nine thousand, nine hundred four".