22365890 has 32 divisors (see below), whose sum is σ = 42923520. Its totient is φ = 8371264.

The previous prime is 22365887. The next prime is 22365899. The reversal of 22365890 is 9856322.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22365890.

It is not an unprimeable number, because it can be changed into a prime (22365899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9776 + ... + 11844.

It is an arithmetic number, because the mean of its divisors is an integer number (1341360).

Almost surely, 2^22365890 is an apocalyptic number.

22365890 is a deficient number, since it is larger than the sum of its proper divisors (20557630).

22365890 is a wasteful number, since it uses less digits than its factorization.

22365890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 22365890 is about 4729.2589271470. The cubic root of 22365890 is about 281.7487912593.

The spelling of 22365890 in words is "twenty-two million, three hundred sixty-five thousand, eight hundred ninety".