22720648 has 16 divisors (see below), whose sum is σ = 42759180. Its totient is φ = 11318208.

The previous prime is 22720631. The next prime is 22720673. The reversal of 22720648 is 84602722.

It can be written as a sum of positive squares in 2 ways, for example, as 19342404 + 3378244 = 4398^2 + 1838^2 .

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, 2911 + ... + 7342.

Almost surely, 2^22720648 is an apocalyptic number.

It is an amenable number.

22720648 is a deficient number, since it is larger than the sum of its proper divisors (20038532).

22720648 is a wasteful number, since it uses less digits than its factorization.

22720648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10536 (or 10532 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 22720648 is about 4766.6180883306. The cubic root of 22720648 is about 283.2306426779.

The spelling of 22720648 in words is "twenty-two million, seven hundred twenty thousand, six hundred forty-eight".