22867728 has 60 divisors (see below), whose sum is σ = 63991440. Its totient is φ = 7033728.

The previous prime is 22867699. The next prime is 22867729. The reversal of 22867728 is 82776822.

It is a self number, because there is not a number n which added to its sum of digits gives 22867728.

It is not an unprimeable number, because it can be changed into a prime (22867729) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6703 + ... + 9521.

It is an arithmetic number, because the mean of its divisors is an integer number (1066524).

Almost surely, 2^22867728 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 22867728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31995720).

22867728 is an abundant number, since it is smaller than the sum of its proper divisors (41123712).

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

22867728 is a wasteful number, since it uses less digits than its factorization.

22867728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856 (or 2837 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 22867728 is about 4782.0213299399. The cubic root of 22867728 is about 283.8404843811.

The spelling of 22867728 in words is "twenty-two million, eight hundred sixty-seven thousand, seven hundred twenty-eight".