22042746 has 64 divisors (see below), whose sum is σ = 54743040. Its totient is φ = 6516720.

The previous prime is 22042739. The next prime is 22042751. The reversal of 22042746 is 64724022.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25111 + ... + 25973.

It is an arithmetic number, because the mean of its divisors is an integer number (855360).

Almost surely, 2^22042746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22042746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27371520).

22042746 is an abundant number, since it is smaller than the sum of its proper divisors (32700294).

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

22042746 is a wasteful number, since it uses less digits than its factorization.

22042746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928 (or 922 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 22042746 is about 4694.9702874459. The cubic root of 22042746 is about 280.3852944018.

Adding to 22042746 its reverse (64724022), we get a palindrome (86766768).

It can be divided in two parts, 2204 and 2746, that added together give a triangular number (4950 = T₉₉).

The spelling of 22042746 in words is "twenty-two million, forty-two thousand, seven hundred forty-six".