22261328 has 20 divisors (see below), whose sum is σ = 44619540. Its totient is φ = 10746624.

The previous prime is 22261321. The next prime is 22261361. The reversal of 22261328 is 82316222.

It can be written as a sum of positive squares in 2 ways, for example, as 18905104 + 3356224 = 4348^2 + 1832^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22261297 and 22261306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22261321) 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, 23525 + ... + 24452.

It is an arithmetic number, because the mean of its divisors is an integer number (2230977).

Almost surely, 2^22261328 is an apocalyptic number.

It is an amenable number.

22261328 is an abundant number, since it is smaller than the sum of its proper divisors (22358212).

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

22261328 is a wasteful number, since it uses less digits than its factorization.

22261328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48014 (or 48008 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 22261328 is about 4718.1911788311. The cubic root of 22261328 is about 281.3090405764.

The spelling of 22261328 in words is "twenty-two million, two hundred sixty-one thousand, three hundred twenty-eight".