22978843 has 4 divisors (see below), whose sum is σ = 23720128. Its totient is φ = 22237560.

The previous prime is 22978831. The next prime is 22978861. The reversal of 22978843 is 34887922.

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: 34887922 = 2 ⋅17443961.

It is a cyclic number.

It is not a de Polignac number, because 22978843 - 2⁵ = 22978811 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 22978843.

It is not an unprimeable number, because it can be changed into a prime (22978243) 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, 370596 + ... + 370657.

It is an arithmetic number, because the mean of its divisors is an integer number (5930032).

Almost surely, 2^22978843 is an apocalyptic number.

22978843 is a deficient number, since it is larger than the sum of its proper divisors (741285).

22978843 is an equidigital number, since it uses as much as digits as its factorization.

22978843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741284.

The product of its digits is 193536, while the sum is 43.

The square root of 22978843 is about 4793.6252460951. The cubic root of 22978843 is about 284.2994716780.

The spelling of 22978843 in words is "twenty-two million, nine hundred seventy-eight thousand, eight hundred forty-three".