22087689 has 32 divisors (see below), whose sum is σ = 32901120. Its totient is φ = 13096512.

The previous prime is 22087687. The next prime is 22087721. The reversal of 22087689 is 98678022.

It is a happy number.

It is not a de Polignac number, because 22087689 - 2¹ = 22087687 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22087689.

It is not an unprimeable number, because it can be changed into a prime (22087687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206374 + ... + 206480.

It is an arithmetic number, because the mean of its divisors is an integer number (1028160).

Almost surely, 2^22087689 is an apocalyptic number.

It is an amenable number.

22087689 is a deficient number, since it is larger than the sum of its proper divisors (10813431).

22087689 is a wasteful number, since it uses less digits than its factorization.

22087689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 22087689 is about 4699.7541425058. The cubic root of 22087689 is about 280.5757244215.

The spelling of 22087689 in words is "twenty-two million, eighty-seven thousand, six hundred eighty-nine".