22387639 has 4 divisors (see below), whose sum is σ = 22488256. Its totient is φ = 22287024.

The previous prime is 22387633. The next prime is 22387661. The reversal of 22387639 is 93678322.

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 22387639 - 2¹⁹ = 21863351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22387633) 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, 49974 + ... + 50419.

It is an arithmetic number, because the mean of its divisors is an integer number (5622064).

Almost surely, 2^22387639 is an apocalyptic number.

22387639 is a deficient number, since it is larger than the sum of its proper divisors (100617).

22387639 is a wasteful number, since it uses less digits than its factorization.

22387639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100616.

The product of its digits is 108864, while the sum is 40.

The square root of 22387639 is about 4731.5577773076. The cubic root of 22387639 is about 281.8400875635.

The spelling of 22387639 in words is "twenty-two million, three hundred eighty-seven thousand, six hundred thirty-nine".