22181488 has 40 divisors (see below), whose sum is σ = 49807328. Its totient is φ = 9372672.

The previous prime is 22181483. The next prime is 22181503. The reversal of 22181488 is 88418122.

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 (22181483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6820 + ... + 9532.

Almost surely, 2^22181488 is an apocalyptic number.

22181488 is a gapful number since it is divisible by the number (28) 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 22181488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24903664).

22181488 is an abundant number, since it is smaller than the sum of its proper divisors (27625840).

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

22181488 is a wasteful number, since it uses less digits than its factorization.

22181488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801 (or 2795 counting only the distinct ones).

The product of its digits is 8192, while the sum is 34.

The square root of 22181488 is about 4709.7227094597. The cubic root of 22181488 is about 280.9723338305.

The spelling of 22181488 in words is "twenty-two million, one hundred eighty-one thousand, four hundred eighty-eight".