22123778 has 8 divisors (see below), whose sum is σ = 33213180. Its totient is φ = 11052720.

The previous prime is 22123757. The next prime is 22123799. The reversal of 22123778 is 87732122.

It is an interprime number because it is at equal distance from previous prime (22123757) and next prime (22123799).

It can be written as a sum of positive squares in 2 ways, for example, as 18464209 + 3659569 = 4297^2 + 1913^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1013 + ... + 6728.

Almost surely, 2^22123778 is an apocalyptic number.

22123778 is a deficient number, since it is larger than the sum of its proper divisors (11089402).

22123778 is a wasteful number, since it uses less digits than its factorization.

22123778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9172.

The product of its digits is 9408, while the sum is 32.

The square root of 22123778 is about 4703.5920316286. The cubic root of 22123778 is about 280.7284518456.

The spelling of 22123778 in words is "twenty-two million, one hundred twenty-three thousand, seven hundred seventy-eight".