22788778 has 4 divisors (see below), whose sum is σ = 34183170. Its totient is φ = 11394388.

The previous prime is 22788767. The next prime is 22788797. The reversal of 22788778 is 87788722.

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., 21132409 + 1656369 = 4597^2 + 1287^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5697193 + ... + 5697196.

Almost surely, 2^22788778 is an apocalyptic number.

22788778 is a deficient number, since it is larger than the sum of its proper divisors (11394392).

22788778 is a wasteful number, since it uses less digits than its factorization.

22788778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11394391.

The product of its digits is 702464, while the sum is 49.

The square root of 22788778 is about 4773.7593152567. The cubic root of 22788778 is about 283.5134580901.

The spelling of 22788778 in words is "twenty-two million, seven hundred eighty-eight thousand, seven hundred seventy-eight".