22987749 has 16 divisors (see below), whose sum is σ = 31965120. Its totient is φ = 14676480.

The previous prime is 22987729. The next prime is 22987751. The reversal of 22987749 is 94778922.

It is not a de Polignac number, because 22987749 - 2¹¹ = 22985701 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22987698 and 22987707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22987729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10389 + ... + 12405.

It is an arithmetic number, because the mean of its divisors is an integer number (1997820).

Almost surely, 2^22987749 is an apocalyptic number.

22987749 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22987749 is a deficient number, since it is larger than the sum of its proper divisors (8977371).

22987749 is a wasteful number, since it uses less digits than its factorization.

22987749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180.

The product of its digits is 508032, while the sum is 48.

The square root of 22987749 is about 4794.5540981409. The cubic root of 22987749 is about 284.3361959531.

It can be divided in two parts, 229 and 87749, that added together give a palindrome (87978).

The spelling of 22987749 in words is "twenty-two million, nine hundred eighty-seven thousand, seven hundred forty-nine".