22403232 has 72 divisors (see below), whose sum is σ = 64393056. Its totient is φ = 7387776.

The previous prime is 22403231. The next prime is 22403233. The reversal of 22403232 is 23230422.

It is an interprime number because it is at equal distance from previous prime (22403231) and next prime (22403233).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

22403232 is a modest number, since divided by 3232 gives 2240 as remainder.

It is not an unprimeable number, because it can be changed into a prime (22403231) 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 11 ways as a sum of consecutive naturals, for example, 30453 + ... + 31179.

It is an arithmetic number, because the mean of its divisors is an integer number (894348).

Almost surely, 2^22403232 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 22403232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32196528).

22403232 is an abundant number, since it is smaller than the sum of its proper divisors (41989824).

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

22403232 is a wasteful number, since it uses less digits than its factorization.

22403232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 22403232 is about 4733.2052564832. The cubic root of 22403232 is about 281.9055062910.

Adding to 22403232 its reverse (23230422), we get a palindrome (45633654).

The spelling of 22403232 in words is "twenty-two million, four hundred three thousand, two hundred thirty-two".