22394387 has 4 divisors (see below), whose sum is σ = 23368080. Its totient is φ = 21420696.

The previous prime is 22394347. The next prime is 22394399. The reversal of 22394387 is 78349322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78349322 = 2 ⋅39174661.

It is a cyclic number.

It is not a de Polignac number, because 22394387 - 2⁸ = 22394131 is a prime.

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 22394387.

It is not an unprimeable number, because it can be changed into a prime (22394347) 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 3 ways as a sum of consecutive naturals, for example, 486812 + ... + 486857.

It is an arithmetic number, because the mean of its divisors is an integer number (5842020).

Almost surely, 2^22394387 is an apocalyptic number.

22394387 is a deficient number, since it is larger than the sum of its proper divisors (973693).

22394387 is an equidigital number, since it uses as much as digits as its factorization.

22394387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973692.

The product of its digits is 72576, while the sum is 38.

The square root of 22394387 is about 4732.2708079737. The cubic root of 22394387 is about 281.8684017872.

The spelling of 22394387 in words is "twenty-two million, three hundred ninety-four thousand, three hundred eighty-seven".