22331904 has 160 divisors (see below), whose sum is σ = 71233536. Its totient is φ = 6082560.

The previous prime is 22331899. The next prime is 22331923. The reversal of 22331904 is 40913322.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333279 + ... + 333345.

Almost surely, 2^22331904 is an apocalyptic number.

22331904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22331904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35616768).

22331904 is an abundant number, since it is smaller than the sum of its proper divisors (48901632).

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

22331904 is an equidigital number, since it uses as much as digits as its factorization.

22331904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 22331904 is about 4725.6643977329. The cubic root of 22331904 is about 281.6060088249.

The spelling of 22331904 in words is "twenty-two million, three hundred thirty-one thousand, nine hundred four".