22981387 has 8 divisors (see below), whose sum is σ = 26999280. Its totient is φ = 19284960.

The previous prime is 22981381. The next prime is 22981391. The reversal of 22981387 is 78318922.

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 22981387 - 2³ = 22981379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22981381) 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, 80212 + ... + 80497.

It is an arithmetic number, because the mean of its divisors is an integer number (3374910).

Almost surely, 2^22981387 is an apocalyptic number.

22981387 is a deficient number, since it is larger than the sum of its proper divisors (4017893).

22981387 is a wasteful number, since it uses less digits than its factorization.

22981387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160733.

The product of its digits is 48384, while the sum is 40.

The square root of 22981387 is about 4793.8905911587. The cubic root of 22981387 is about 284.3099629397.

The spelling of 22981387 in words is "twenty-two million, nine hundred eighty-one thousand, three hundred eighty-seven".