22768981 has 8 divisors (see below), whose sum is σ = 23474304. Its totient is φ = 22070880.

The previous prime is 22768939. The next prime is 22768987. The reversal of 22768981 is 18986722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22768981 - 2⁹ = 22768469 is a prime.

It is a super-2 number, since 2×22768981² = 1036852991556722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22768987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4980 + ... + 8386.

It is an arithmetic number, because the mean of its divisors is an integer number (2934288).

Almost surely, 2^22768981 is an apocalyptic number.

It is an amenable number.

22768981 is a deficient number, since it is larger than the sum of its proper divisors (705323).

22768981 is a wasteful number, since it uses less digits than its factorization.

22768981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611.

The product of its digits is 96768, while the sum is 43.

The square root of 22768981 is about 4771.6853416796. The cubic root of 22768981 is about 283.4313366471.

The spelling of 22768981 in words is "twenty-two million, seven hundred sixty-eight thousand, nine hundred eighty-one".