22724865 has 48 divisors (see below), whose sum is σ = 41081040. Its totient is φ = 11612160.

The previous prime is 22724843. The next prime is 22724887. The reversal of 22724865 is 56842722.

It is an interprime number because it is at equal distance from previous prime (22724843) and next prime (22724887).

It can be written as a sum of positive squares in 8 ways, for example, as 6780816 + 15944049 = 2604^2 + 3993^2 .

It is not a de Polignac number, because 22724865 - 2⁵ = 22724833 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 201049 + ... + 201161.

It is an arithmetic number, because the mean of its divisors is an integer number (855855).

Almost surely, 2^22724865 is an apocalyptic number.

It is an amenable number.

22724865 is a deficient number, since it is larger than the sum of its proper divisors (18356175).

22724865 is a wasteful number, since it uses less digits than its factorization.

22724865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 271 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 22724865 is about 4767.0604149727. The cubic root of 22724865 is about 283.2481643280.

The spelling of 22724865 in words is "twenty-two million, seven hundred twenty-four thousand, eight hundred sixty-five".