22216890 has 32 divisors (see below), whose sum is σ = 56128320. Its totient is φ = 5612544.

The previous prime is 22216861. The next prime is 22216891. The reversal of 22216890 is 9861222.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (22216891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18919 + ... + 20058.

It is an arithmetic number, because the mean of its divisors is an integer number (1754010).

Almost surely, 2^22216890 is an apocalyptic number.

22216890 is an abundant number, since it is smaller than the sum of its proper divisors (33911430).

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

22216890 is a wasteful number, since it uses less digits than its factorization.

22216890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39006.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 22216890 is about 4713.4796064054. The cubic root of 22216890 is about 281.1217331164.

The spelling of 22216890 in words is "twenty-two million, two hundred sixteen thousand, eight hundred ninety".