22644402 has 64 divisors (see below), whose sum is σ = 51701760. Its totient is φ = 6552000.

The previous prime is 22644383. The next prime is 22644421. The reversal of 22644402 is 20444622.

It is an interprime number because it is at equal distance from previous prime (22644383) and next prime (22644421).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224152 + ... + 224252.

It is an arithmetic number, because the mean of its divisors is an integer number (807840).

Almost surely, 2^22644402 is an apocalyptic number.

22644402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22644402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25850880).

22644402 is an abundant number, since it is smaller than the sum of its proper divisors (29057358).

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

22644402 is a wasteful number, since it uses less digits than its factorization.

22644402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 22644402 is about 4758.6134535177. The cubic root of 22644402 is about 282.9134656160.

It can be divided in two parts, 2264 and 4402, that added together give a palindrome (6666).

The spelling of 22644402 in words is "twenty-two million, six hundred forty-four thousand, four hundred two".