22387905 has 12 divisors (see below), whose sum is σ = 38805780. Its totient is φ = 11940192.

The previous prime is 22387903. The next prime is 22387943. The reversal of 22387905 is 50978322.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17338896 + 5049009 = 4164^2 + 2247^2 .

It is not a de Polignac number, because 22387905 - 2¹ = 22387903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22387905.

It is not an unprimeable number, because it can be changed into a prime (22387903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248710 + ... + 248799.

It is an arithmetic number, because the mean of its divisors is an integer number (3233815).

Almost surely, 2^22387905 is an apocalyptic number.

It is an amenable number.

22387905 is a deficient number, since it is larger than the sum of its proper divisors (16417875).

22387905 is a wasteful number, since it uses less digits than its factorization.

22387905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497520 (or 497517 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 22387905 is about 4731.5858863599. The cubic root of 22387905 is about 281.8412037920.

The spelling of 22387905 in words is "twenty-two million, three hundred eighty-seven thousand, nine hundred five".