22798778 has 4 divisors (see below), whose sum is σ = 34198170. Its totient is φ = 11399388.

The previous prime is 22798757. The next prime is 22798781. The reversal of 22798778 is 87789722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87789722 = 2 ⋅43894861.

It can be written as a sum of positive squares in only one way, i.e., 15578809 + 7219969 = 3947^2 + 2687^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5699693 + ... + 5699696.

Almost surely, 2^22798778 is an apocalyptic number.

22798778 is a deficient number, since it is larger than the sum of its proper divisors (11399392).

22798778 is a wasteful number, since it uses less digits than its factorization.

22798778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11399391.

The product of its digits is 790272, while the sum is 50.

The square root of 22798778 is about 4774.8065929417. The cubic root of 22798778 is about 283.5549217729.

The spelling of 22798778 in words is "twenty-two million, seven hundred ninety-eight thousand, seven hundred seventy-eight".