22499789 has 16 divisors (see below), whose sum is σ = 26092080. Its totient is φ = 19215360.

The previous prime is 22499767. The next prime is 22499803. The reversal of 22499789 is 98799422.

It can be written as a sum of positive squares in 8 ways, for example, as 2402500 + 20097289 = 1550^2 + 4483^2 .

It is a cyclic number.

It is not a de Polignac number, because 22499789 - 2¹⁶ = 22434253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22499749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12647 + ... + 14315.

It is an arithmetic number, because the mean of its divisors is an integer number (1630755).

Almost surely, 2^22499789 is an apocalyptic number.

It is an amenable number.

22499789 is a deficient number, since it is larger than the sum of its proper divisors (3592291).

22499789 is a wasteful number, since it uses less digits than its factorization.

22499789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760.

The product of its digits is 653184, while the sum is 50.

The square root of 22499789 is about 4743.3942488475. The cubic root of 22499789 is about 282.3099261789.

The spelling of 22499789 in words is "twenty-two million, four hundred ninety-nine thousand, seven hundred eighty-nine".