22509890 has 32 divisors (see below), whose sum is σ = 43848000. Its totient is φ = 8270784.

The previous prime is 22509881. The next prime is 22509919. The reversal of 22509890 is 9890522.

It is a self number, because there is not a number n which added to its sum of digits gives 22509890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44861 + ... + 45359.

It is an arithmetic number, because the mean of its divisors is an integer number (1370250).

Almost surely, 2^22509890 is an apocalyptic number.

22509890 is a deficient number, since it is larger than the sum of its proper divisors (21338110).

22509890 is a wasteful number, since it uses less digits than its factorization.

22509890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 22509890 is about 4744.4588732541. The cubic root of 22509890 is about 282.3521663667.

The spelling of 22509890 in words is "twenty-two million, five hundred nine thousand, eight hundred ninety".