22289890 has 32 divisors (see below), whose sum is σ = 48553344. Its totient is φ = 7192320.

The previous prime is 22289887. The next prime is 22289903. The reversal of 22289890 is 9898222.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8176 + ... + 10555.

It is an arithmetic number, because the mean of its divisors is an integer number (1517292).

Almost surely, 2^22289890 is an apocalyptic number.

22289890 is an abundant number, since it is smaller than the sum of its proper divisors (26263454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22289890 is a wasteful number, since it uses less digits than its factorization.

22289890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18762.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 22289890 is about 4721.2170041209. The cubic root of 22289890 is about 281.4292986758.

The spelling of 22289890 in words is "twenty-two million, two hundred eighty-nine thousand, eight hundred ninety".