22865724 has 72 divisors (see below), whose sum is σ = 68210688. Its totient is φ = 6320160.

The previous prime is 22865719. The next prime is 22865729. The reversal of 22865724 is 42756822.

22865724 is a `hidden beast` number, since 2 + 2 + 86 + 572 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (22865719) and next prime (22865729).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22865729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6349 + ... + 9275.

Almost surely, 2^22865724 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22865724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34105344).

22865724 is an abundant number, since it is smaller than the sum of its proper divisors (45344964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22865724 is a wasteful number, since it uses less digits than its factorization.

22865724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2975 (or 2970 counting only the distinct ones).

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

The square root of 22865724 is about 4781.8117905246. The cubic root of 22865724 is about 283.8321927405.

The spelling of 22865724 in words is "twenty-two million, eight hundred sixty-five thousand, seven hundred twenty-four".