22661730 has 96 divisors (see below), whose sum is σ = 72543744. Its totient is φ = 4779648.

The previous prime is 22661729. The next prime is 22661747. The reversal of 22661730 is 3716622.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22661694 and 22661703.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6807 + ... + 9573.

It is an arithmetic number, because the mean of its divisors is an integer number (755664).

Almost surely, 2^22661730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22661730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36271872).

22661730 is an abundant number, since it is smaller than the sum of its proper divisors (49882014).

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

22661730 is a wasteful number, since it uses less digits than its factorization.

22661730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800 (or 2797 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 22661730 is about 4760.4338037620. The cubic root of 22661730 is about 282.9856111086.

The spelling of 22661730 in words is "twenty-two million, six hundred sixty-one thousand, seven hundred thirty".