22179890 has 16 divisors (see below), whose sum is σ = 40150080. Its totient is φ = 8821680.

The previous prime is 22179887. The next prime is 22179901. The reversal of 22179890 is 9897122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4406 + ... + 7985.

It is an arithmetic number, because the mean of its divisors is an integer number (2509380).

Almost surely, 2^22179890 is an apocalyptic number.

22179890 is a deficient number, since it is larger than the sum of its proper divisors (17970190).

22179890 is a wasteful number, since it uses less digits than its factorization.

22179890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12577.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 22179890 is about 4709.5530573506. The cubic root of 22179890 is about 280.9655863936.

The spelling of 22179890 in words is "twenty-two million, one hundred seventy-nine thousand, eight hundred ninety".