22872978 has 48 divisors (see below), whose sum is σ = 51667200. Its totient is φ = 7305120.

The previous prime is 22872977. The next prime is 22873003. The reversal of 22872978 is 87927822.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22872977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99768 + ... + 99996.

It is an arithmetic number, because the mean of its divisors is an integer number (1076400).

Almost surely, 2^22872978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22872978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25833600).

22872978 is an abundant number, since it is smaller than the sum of its proper divisors (28794222).

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

22872978 is a wasteful number, since it uses less digits than its factorization.

22872978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 444 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 22872978 is about 4782.5702294896. The cubic root of 22872978 is about 283.8622041969.

The spelling of 22872978 in words is "twenty-two million, eight hundred seventy-two thousand, nine hundred seventy-eight".