22297890 has 16 divisors (see below), whose sum is σ = 53515008. Its totient is φ = 5946096.

The previous prime is 22297889. The next prime is 22297907. The reversal of 22297890 is 9879222.

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 7 ways as a sum of consecutive naturals, for example, 371602 + ... + 371661.

It is an arithmetic number, because the mean of its divisors is an integer number (3344688).

Almost surely, 2^22297890 is an apocalyptic number.

22297890 is an abundant number, since it is smaller than the sum of its proper divisors (31217118).

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

22297890 is a wasteful number, since it uses less digits than its factorization.

22297890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743273.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 22297890 is about 4722.0641672896. The cubic root of 22297890 is about 281.4629636406.

The spelling of 22297890 in words is "twenty-two million, two hundred ninety-seven thousand, eight hundred ninety".