22271990 has 64 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 7620480.

The previous prime is 22271987. The next prime is 22272011. The reversal of 22271990 is 9917222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175307 + ... + 175433.

It is an arithmetic number, because the mean of its divisors is an integer number (725760).

Almost surely, 2^22271990 is an apocalyptic number.

22271990 is an abundant number, since it is smaller than the sum of its proper divisors (24176650).

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

22271990 is a wasteful number, since it uses less digits than its factorization.

22271990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 22271990 is about 4719.3209257265. The cubic root of 22271990 is about 281.3539441311.

The spelling of 22271990 in words is "twenty-two million, two hundred seventy-one thousand, nine hundred ninety".