22294387 has 4 divisors (see below), whose sum is σ = 22896976. Its totient is φ = 21691800.

The previous prime is 22294379. The next prime is 22294399. The reversal of 22294387 is 78349222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22294387 - 2³ = 22294379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 602551 = 22294387 / (2 + 2 + 2 + 9 + 4 + 3 + 8 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22295387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301239 + ... + 301312.

It is an arithmetic number, because the mean of its divisors is an integer number (5724244).

Almost surely, 2^22294387 is an apocalyptic number.

22294387 is a deficient number, since it is larger than the sum of its proper divisors (602589).

22294387 is an equidigital number, since it uses as much as digits as its factorization.

22294387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602588.

The product of its digits is 48384, while the sum is 37.

The square root of 22294387 is about 4721.6932344234. The cubic root of 22294387 is about 281.4482235853.

The spelling of 22294387 in words is "twenty-two million, two hundred ninety-four thousand, three hundred eighty-seven".