22661872 has 20 divisors (see below), whose sum is σ = 44027440. Its totient is φ = 11299968.

The previous prime is 22661869. The next prime is 22661887. The reversal of 22661872 is 27816622.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4813 + ... + 8275.

It is an arithmetic number, because the mean of its divisors is an integer number (2201372).

Almost surely, 2^22661872 is an apocalyptic number.

It is an amenable number.

22661872 is a deficient number, since it is larger than the sum of its proper divisors (21365568).

22661872 is a wasteful number, since it uses less digits than its factorization.

22661872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880 (or 3874 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 22661872 is about 4760.4487183458. The cubic root of 22661872 is about 282.9862021766.

The spelling of 22661872 in words is "twenty-two million, six hundred sixty-one thousand, eight hundred seventy-two".