22436878 has 4 divisors (see below), whose sum is σ = 33655320. Its totient is φ = 11218438.

The previous prime is 22436873. The next prime is 22436879. The reversal of 22436878 is 87863422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87863422 = 2 ⋅43931711.

It is a self number, because there is not a number n which added to its sum of digits gives 22436878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22436873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5609218 + ... + 5609221.

It is an arithmetic number, because the mean of its divisors is an integer number (8413830).

Almost surely, 2^22436878 is an apocalyptic number.

22436878 is a deficient number, since it is larger than the sum of its proper divisors (11218442).

22436878 is a wasteful number, since it uses less digits than its factorization.

22436878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11218441.

The product of its digits is 129024, while the sum is 40.

The square root of 22436878 is about 4736.7581741102. The cubic root of 22436878 is about 282.0465610626.

The spelling of 22436878 in words is "twenty-two million, four hundred thirty-six thousand, eight hundred seventy-eight".