22856978 has 4 divisors (see below), whose sum is σ = 34285470. Its totient is φ = 11428488.

The previous prime is 22856971. The next prime is 22856989. The reversal of 22856978 is 87965822.

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., 22819729 + 37249 = 4777^2 + 193^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22856971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5714243 + ... + 5714246.

Almost surely, 2^22856978 is an apocalyptic number.

22856978 is a deficient number, since it is larger than the sum of its proper divisors (11428492).

22856978 is a wasteful number, since it uses less digits than its factorization.

22856978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11428491.

The product of its digits is 483840, while the sum is 47.

The square root of 22856978 is about 4780.8971961338. The cubic root of 22856978 is about 283.7960000979.

The spelling of 22856978 in words is "twenty-two million, eight hundred fifty-six thousand, nine hundred seventy-eight".