22287397 has 8 divisors (see below), whose sum is σ = 24656832. Its totient is φ = 19975200.

The previous prime is 22287389. The next prime is 22287413. The reversal of 22287397 is 79378222.

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 22287397 - 2³ = 22287389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22287337) 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, 13488 + ... + 15049.

It is an arithmetic number, because the mean of its divisors is an integer number (3082104).

Almost surely, 2^22287397 is an apocalyptic number.

It is an amenable number.

22287397 is a deficient number, since it is larger than the sum of its proper divisors (2369435).

22287397 is a wasteful number, since it uses less digits than its factorization.

22287397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28619.

The product of its digits is 84672, while the sum is 40.

The square root of 22287397 is about 4720.9529758302. The cubic root of 22287397 is about 281.4188061849.

The spelling of 22287397 in words is "twenty-two million, two hundred eighty-seven thousand, three hundred ninety-seven".