22747788 has 72 divisors (see below), whose sum is σ = 69189120. Its totient is φ = 6156000.

The previous prime is 22747783. The next prime is 22747799. The reversal of 22747788 is 88774722.

It is a super-3 number, since 3×22747788³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22747783) 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, 2413 + ... + 7163.

It is an arithmetic number, because the mean of its divisors is an integer number (960960).

Almost surely, 2^22747788 is an apocalyptic number.

22747788 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 22747788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34594560).

22747788 is an abundant number, since it is smaller than the sum of its proper divisors (46441332).

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

22747788 is a wasteful number, since it uses less digits than its factorization.

22747788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787 (or 4782 counting only the distinct ones).

The product of its digits is 351232, while the sum is 45.

The square root of 22747788 is about 4769.4641208421. The cubic root of 22747788 is about 283.3433715782.

The spelling of 22747788 in words is "twenty-two million, seven hundred forty-seven thousand, seven hundred eighty-eight".