22564878 has 32 divisors (see below), whose sum is σ = 52206336. Its totient is φ = 6368448.

The previous prime is 22564877. The next prime is 22564879. The reversal of 22564878 is 87846522.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22564877) and next prime (22564879).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22564877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250 + ... + 6722.

It is an arithmetic number, because the mean of its divisors is an integer number (1631448).

Almost surely, 2^22564878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22564878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26103168).

22564878 is an abundant number, since it is smaller than the sum of its proper divisors (29641458).

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

22564878 is a wasteful number, since it uses less digits than its factorization.

22564878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6568.

The product of its digits is 215040, while the sum is 42.

The square root of 22564878 is about 4750.2503091942. The cubic root of 22564878 is about 282.5818928791.

The spelling of 22564878 in words is "twenty-two million, five hundred sixty-four thousand, eight hundred seventy-eight".