22788730 has 16 divisors (see below), whose sum is σ = 41124744. Its totient is φ = 9092160.

The previous prime is 22788713. The next prime is 22788737. The reversal of 22788730 is 3788722.

It can be written as a sum of positive squares in 4 ways, for example, as 7241481 + 15547249 = 2691^2 + 3943^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22788730.

It is not an unprimeable number, because it can be changed into a prime (22788737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1504 + ... + 6916.

Almost surely, 2^22788730 is an apocalyptic number.

22788730 is a deficient number, since it is larger than the sum of its proper divisors (18336014).

22788730 is a wasteful number, since it uses less digits than its factorization.

22788730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5841.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 22788730 is about 4773.7542877697. The cubic root of 22788730 is about 283.5132590352.

The spelling of 22788730 in words is "twenty-two million, seven hundred eighty-eight thousand, seven hundred thirty".