22388905 has 16 divisors (see below), whose sum is σ = 33496704. Its totient is φ = 13956480.

The previous prime is 22388879. The next prime is 22388917. The reversal of 22388905 is 50988322.

It is not a de Polignac number, because 22388905 - 2¹⁹ = 21864617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 28692 + ... + 29461.

It is an arithmetic number, because the mean of its divisors is an integer number (2093544).

Almost surely, 2^22388905 is an apocalyptic number.

It is an amenable number.

22388905 is a deficient number, since it is larger than the sum of its proper divisors (11107799).

22388905 is a wasteful number, since it uses less digits than its factorization.

22388905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58176.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 22388905 is about 4731.6915579949. The cubic root of 22388905 is about 281.8454000609.

The spelling of 22388905 in words is "twenty-two million, three hundred eighty-eight thousand, nine hundred five".