22328772 has 12 divisors (see below), whose sum is σ = 52100496. Its totient is φ = 7442920.

The previous prime is 22328771. The next prime is 22328783. The reversal of 22328772 is 27782322.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×22328772³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22328771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 930354 + ... + 930377.

It is an arithmetic number, because the mean of its divisors is an integer number (4341708).

Almost surely, 2^22328772 is an apocalyptic number.

It is an amenable number.

22328772 is an abundant number, since it is smaller than the sum of its proper divisors (29771724).

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

22328772 is a wasteful number, since it uses less digits than its factorization.

22328772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860738 (or 1860736 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 22328772 is about 4725.3330041384. Note that the first 3 decimals coincide. The cubic root of 22328772 is about 281.5928433368.

The spelling of 22328772 in words is "twenty-two million, three hundred twenty-eight thousand, seven hundred seventy-two".