22687985 has 4 divisors (see below), whose sum is σ = 27225588. Its totient is φ = 18150384.

The previous prime is 22687963. The next prime is 22687991. The reversal of 22687985 is 58978622.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12759184 + 9928801 = 3572^2 + 3151^2 .

It is a cyclic number.

It is not a de Polignac number, because 22687985 - 2¹² = 22683889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2268794 + ... + 2268803.

It is an arithmetic number, because the mean of its divisors is an integer number (6806397).

Almost surely, 2^22687985 is an apocalyptic number.

It is an amenable number.

22687985 is a deficient number, since it is larger than the sum of its proper divisors (4537603).

22687985 is an equidigital number, since it uses as much as digits as its factorization.

22687985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537602.

The product of its digits is 483840, while the sum is 47.

The square root of 22687985 is about 4763.1906323388. The cubic root of 22687985 is about 283.0948543096.

The spelling of 22687985 in words is "twenty-two million, six hundred eighty-seven thousand, nine hundred eighty-five".