18222292 has 48 divisors (see below), whose sum is σ = 37255680. Its totient is φ = 7711200.

The previous prime is 18222289. The next prime is 18222299. The reversal of 18222292 is 29222281.

It is a self number, because there is not a number n which added to its sum of digits gives 18222292.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222299) 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, 59203 + ... + 59509.

It is an arithmetic number, because the mean of its divisors is an integer number (776160).

Almost surely, 2^18222292 is an apocalyptic number.

It is an amenable number.

18222292 is an abundant number, since it is smaller than the sum of its proper divisors (19033388).

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

18222292 is a wasteful number, since it uses less digits than its factorization.

18222292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 410 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 18222292 is about 4268.7576647076. The cubic root of 18222292 is about 263.1485616536.

It can be divided in two parts, 1822 and 2292, that added together give a palindrome (4114).

The spelling of 18222292 in words is "eighteen million, two hundred twenty-two thousand, two hundred ninety-two".