22404489688 has 64 divisors (see below), whose sum is σ = 49314323520. Its totient is φ = 9342259200.

The previous prime is 22404489637. The next prime is 22404489689. The reversal of 22404489688 is 88698440422.

It is a happy number.

It is a super-2 number, since 2×22404489688² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404489689) 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, 843328 + ... + 869488.

It is an arithmetic number, because the mean of its divisors is an integer number (770536305).

Almost surely, 2^22404489688 is an apocalyptic number.

22404489688 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 22404489688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24657161760).

22404489688 is an abundant number, since it is smaller than the sum of its proper divisors (26909833832).

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

22404489688 is a wasteful number, since it uses less digits than its factorization.

22404489688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26588 (or 26584 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 55.

The spelling of 22404489688 in words is "twenty-two billion, four hundred four million, four hundred eighty-nine thousand, six hundred eighty-eight".