22008887 has 4 divisors (see below), whose sum is σ = 22136280. Its totient is φ = 21881496.

The previous prime is 22008871. The next prime is 22008893. The reversal of 22008887 is 78880022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22008887 - 2⁴ = 22008871 is a prime.

It is a super-2 number, since 2×22008887² = 968782213957538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22008817) 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, 63437 + ... + 63782.

It is an arithmetic number, because the mean of its divisors is an integer number (5534070).

Almost surely, 2^22008887 is an apocalyptic number.

22008887 is a deficient number, since it is larger than the sum of its proper divisors (127393).

22008887 is a wasteful number, since it uses less digits than its factorization.

22008887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127392.

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 22008887 is about 4691.3630215535. The cubic root of 22008887 is about 280.2416578704.

The spelling of 22008887 in words is "twenty-two million, eight thousand, eight hundred eighty-seven".