22061688 has 96 divisors (see below), whose sum is σ = 62052480. Its totient is φ = 6529600.

The previous prime is 22061681. The next prime is 22061701. The reversal of 22061688 is 88616022.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22061681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206131 + ... + 206237.

It is an arithmetic number, because the mean of its divisors is an integer number (646380).

Almost surely, 2^22061688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22061688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31026240).

22061688 is an abundant number, since it is smaller than the sum of its proper divisors (39990792).

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

22061688 is a wasteful number, since it uses less digits than its factorization.

22061688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 22061688 is about 4696.9871194203. The cubic root of 22061688 is about 280.4655859356.

The spelling of 22061688 in words is "twenty-two million, sixty-one thousand, six hundred eighty-eight".