22708981 has 8 divisors (see below), whose sum is σ = 23880384. Its totient is φ = 21552960.

The previous prime is 22708979. The next prime is 22709003. The reversal of 22708981 is 18980722.

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 22708981 - 2¹ = 22708979 is a prime.

It is a super-2 number, since 2×22708981² = 1031395636116722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22708981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22708901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756 + ... + 6781.

It is an arithmetic number, because the mean of its divisors is an integer number (2985048).

Almost surely, 2^22708981 is an apocalyptic number.

It is an amenable number.

22708981 is a deficient number, since it is larger than the sum of its proper divisors (1171403).

22708981 is a wasteful number, since it uses less digits than its factorization.

22708981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7691.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 22708981 is about 4765.3941075214. The cubic root of 22708981 is about 283.1821549517.

The spelling of 22708981 in words is "twenty-two million, seven hundred eight thousand, nine hundred eighty-one".