22127742 has 160 divisors (see below), whose sum is σ = 65049600. Its totient is φ = 5458752.

The previous prime is 22127719. The next prime is 22127747. The reversal of 22127742 is 24772122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22127747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 280059 + ... + 280137.

It is an arithmetic number, because the mean of its divisors is an integer number (406560).

Almost surely, 2^22127742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22127742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32524800).

22127742 is an abundant number, since it is smaller than the sum of its proper divisors (42921858).

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

22127742 is a wasteful number, since it uses less digits than its factorization.

22127742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 123 counting only the distinct ones).

The product of its digits is 3136, while the sum is 27.

The square root of 22127742 is about 4704.0133928381. The cubic root of 22127742 is about 280.7452172331.

Adding to 22127742 its reverse (24772122), we get a palindrome (46899864).

The spelling of 22127742 in words is "twenty-two million, one hundred twenty-seven thousand, seven hundred forty-two".