12222784 has 28 divisors (see below), whose sum is σ = 27720544. Its totient is φ = 5238144.

The previous prime is 12222781. The next prime is 12222799. The reversal of 12222784 is 48722221.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13194 + ... + 14089.

Almost surely, 2^12222784 is an apocalyptic number.

12222784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12222784 is an abundant number, since it is smaller than the sum of its proper divisors (15497760).

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

12222784 is an equidigital number, since it uses as much as digits as its factorization.

12222784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27302 (or 27292 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 12222784 is about 3496.1098380915. The cubic root of 12222784 is about 230.3509701483.

The spelling of 12222784 in words is "twelve million, two hundred twenty-two thousand, seven hundred eighty-four".