22393904 has 80 divisors (see below), whose sum is σ = 50663424. Its totient is φ = 9504000.

The previous prime is 22393871. The next prime is 22393907. The reversal of 22393904 is 40939322.

It is a super-2 number, since 2×22393904² = 1002973872722432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22393907) 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 15 ways as a sum of consecutive naturals, for example, 148229 + ... + 148379.

Almost surely, 2^22393904 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 22393904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25331712).

22393904 is an abundant number, since it is smaller than the sum of its proper divisors (28269520).

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

22393904 is a wasteful number, since it uses less digits than its factorization.

22393904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 22393904 is about 4732.2197751161. The cubic root of 22393904 is about 281.8663753357.

The spelling of 22393904 in words is "twenty-two million, three hundred ninety-three thousand, nine hundred four".