22605887 has 4 divisors (see below), whose sum is σ = 22634640. Its totient is φ = 22577136.

The previous prime is 22605857. The next prime is 22605899. The reversal of 22605887 is 78850622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78850622 = 2 ⋅39425311.

It is a cyclic number.

It is not a de Polignac number, because 22605887 - 2⁶ = 22605823 is a prime.

It is a super-2 number, since 2×22605887² = 1022052254113538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22605887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22605827) 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, 13163 + ... + 14780.

It is an arithmetic number, because the mean of its divisors is an integer number (5658660).

Almost surely, 2^22605887 is an apocalyptic number.

22605887 is a deficient number, since it is larger than the sum of its proper divisors (28753).

22605887 is an equidigital number, since it uses as much as digits as its factorization.

22605887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28752.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 22605887 is about 4754.5648591643. The cubic root of 22605887 is about 282.7529756822.

The spelling of 22605887 in words is "twenty-two million, six hundred five thousand, eight hundred eighty-seven".