22280656 has 10 divisors (see below), whose sum is σ = 43168802. Its totient is φ = 11140320.

The previous prime is 22280641. The next prime is 22280663. The reversal of 22280656 is 65608222.

It can be written as a sum of positive squares in only one way, i.e., 22240656 + 40000 = 4716^2 + 200^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696255 + ... + 696286.

Almost surely, 2^22280656 is an apocalyptic number.

It is an amenable number.

22280656 is a deficient number, since it is larger than the sum of its proper divisors (20888146).

22280656 is a wasteful number, since it uses less digits than its factorization.

22280656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392549 (or 1392543 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 22280656 is about 4720.2389770011. The cubic root of 22280656 is about 281.3904308739.

Adding to 22280656 its reverse (65608222), we get a palindrome (87888878).

The spelling of 22280656 in words is "twenty-two million, two hundred eighty thousand, six hundred fifty-six".