22287839 has 4 divisors (see below), whose sum is σ = 25471824. Its totient is φ = 19103856.

The previous prime is 22287829. The next prime is 22287847. The reversal of 22287839 is 93878222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22287839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22287796 and 22287805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22287829) 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, 1591982 + ... + 1591995.

It is an arithmetic number, because the mean of its divisors is an integer number (6367956).

Almost surely, 2^22287839 is an apocalyptic number.

22287839 is a deficient number, since it is larger than the sum of its proper divisors (3183985).

22287839 is an equidigital number, since it uses as much as digits as its factorization.

22287839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183984.

The product of its digits is 96768, while the sum is 41.

The square root of 22287839 is about 4720.9997881805. Note that the first 3 decimals coincide. The cubic root of 22287839 is about 281.4206665232.

The spelling of 22287839 in words is "twenty-two million, two hundred eighty-seven thousand, eight hundred thirty-nine".