16222990 has 32 divisors (see below), whose sum is σ = 34089984. Its totient is φ = 5442720.

The previous prime is 16222963. The next prime is 16222991. The reversal of 16222990 is 9922261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16222991) 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, 825 + ... + 5755.

It is an arithmetic number, because the mean of its divisors is an integer number (1065312).

Almost surely, 2^16222990 is an apocalyptic number.

16222990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16222990 is an abundant number, since it is smaller than the sum of its proper divisors (17866994).

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

16222990 is a wasteful number, since it uses less digits than its factorization.

16222990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4992.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 16222990 is about 4027.7773026820. Note that the first 3 decimals coincide. The cubic root of 16222990 is about 253.1494375634.

The spelling of 16222990 in words is "sixteen million, two hundred twenty-two thousand, nine hundred ninety".