22049640 has 96 divisors (see below), whose sum is σ = 74805120. Its totient is φ = 5622144.

The previous prime is 22049623. The next prime is 22049641. The reversal of 22049640 is 4694022.

It is not an unprimeable number, because it can be changed into a prime (22049641) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 6949 + ... + 9611.

It is an arithmetic number, because the mean of its divisors is an integer number (779220).

Almost surely, 2^22049640 is an apocalyptic number.

22049640 is a gapful number since it is divisible by the number (20) 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 22049640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37402560).

22049640 is an abundant number, since it is smaller than the sum of its proper divisors (52755480).

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

22049640 is a wasteful number, since it uses less digits than its factorization.

22049640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703 (or 2696 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 22049640 is about 4695.7044199992. The cubic root of 22049640 is about 280.4145220782.

The spelling of 22049640 in words is "twenty-two million, forty-nine thousand, six hundred forty".