22878866 has 4 divisors (see below), whose sum is σ = 34318302. Its totient is φ = 11439432.

The previous prime is 22878851. The next prime is 22878871. The reversal of 22878866 is 66887822.

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

It can be written as a sum of positive squares in only one way, i.e., 21353641 + 1525225 = 4621^2 + 1235^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22878866.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5719715 + ... + 5719718.

Almost surely, 2^22878866 is an apocalyptic number.

22878866 is a deficient number, since it is larger than the sum of its proper divisors (11439436).

22878866 is a wasteful number, since it uses less digits than its factorization.

22878866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11439435.

The product of its digits is 516096, while the sum is 47.

The square root of 22878866 is about 4783.1857584668. The cubic root of 22878866 is about 283.8865595339.

The spelling of 22878866 in words is "twenty-two million, eight hundred seventy-eight thousand, eight hundred sixty-six".