18222792 has 64 divisors (see below), whose sum is σ = 53760000. Its totient is φ = 5037120.

The previous prime is 18222791. The next prime is 18222797. The reversal of 18222792 is 29722281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222791) 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, 3459 + ... + 6957.

It is an arithmetic number, because the mean of its divisors is an integer number (840000).

Almost surely, 2^18222792 is an apocalyptic number.

18222792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18222792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26880000).

18222792 is an abundant number, since it is smaller than the sum of its proper divisors (35537208).

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

18222792 is a wasteful number, since it uses less digits than its factorization.

18222792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3546 (or 3542 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 18222792 is about 4268.8162293545. The cubic root of 18222792 is about 263.1509684689.

It can be divided in two parts, 1822279 and 2, that added together give a palindrome (1822281).

The spelling of 18222792 in words is "eighteen million, two hundred twenty-two thousand, seven hundred ninety-two".