22280732 has 12 divisors (see below), whose sum is σ = 39138120. Its totient is φ = 11098416.

The previous prime is 22280719. The next prime is 22280743. The reversal of 22280732 is 23708222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9278 + ... + 11429.

It is an arithmetic number, because the mean of its divisors is an integer number (3261510).

Almost surely, 2^22280732 is an apocalyptic number.

It is an amenable number.

22280732 is a deficient number, since it is larger than the sum of its proper divisors (16857388).

22280732 is a wasteful number, since it uses less digits than its factorization.

22280732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20980 (or 20978 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 22280732 is about 4720.2470274341. The cubic root of 22280732 is about 281.3907508174.

Adding to 22280732 its reverse (23708222), we get a palindrome (45988954).

The spelling of 22280732 in words is "twenty-two million, two hundred eighty thousand, seven hundred thirty-two".