22001744 has 10 divisors (see below), whose sum is σ = 42628410. Its totient is φ = 11000864.

The previous prime is 22001743. The next prime is 22001773. The reversal of 22001744 is 44710022.

It can be written as a sum of positive squares in only one way, i.e., 16711744 + 5290000 = 4088^2 + 2300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687539 + ... + 687570.

It is an arithmetic number, because the mean of its divisors is an integer number (4262841).

Almost surely, 2^22001744 is an apocalyptic number.

It is an amenable number.

22001744 is a deficient number, since it is larger than the sum of its proper divisors (20626666).

22001744 is a wasteful number, since it uses less digits than its factorization.

22001744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375117 (or 1375111 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 22001744 is about 4690.6016671638. The cubic root of 22001744 is about 280.2113370466.

Adding to 22001744 its reverse (44710022), we get a palindrome (66711766).

The spelling of 22001744 in words is "twenty-two million, one thousand, seven hundred forty-four".