22779779 has 16 divisors (see below), whose sum is σ = 26757216. Its totient is φ = 19161600.

The previous prime is 22779769. The next prime is 22779781. The reversal of 22779779 is 97797722.

It is a cyclic number.

It is not a de Polignac number, because 22779779 - 2⁴ = 22779763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22779769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10409 + ... + 12405.

It is an arithmetic number, because the mean of its divisors is an integer number (1672326).

Almost surely, 2^22779779 is an apocalyptic number.

22779779 is a deficient number, since it is larger than the sum of its proper divisors (3977437).

22779779 is a wasteful number, since it uses less digits than its factorization.

22779779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086.

The product of its digits is 777924, while the sum is 50.

The square root of 22779779 is about 4772.8166736216. The cubic root of 22779779 is about 283.4761345514.

The spelling of 22779779 in words is "twenty-two million, seven hundred seventy-nine thousand, seven hundred seventy-nine".