22628779 has 4 divisors (see below), whose sum is σ = 22780800. Its totient is φ = 22476760.

The previous prime is 22628773. The next prime is 22628807. The reversal of 22628779 is 97782622.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22628779 - 2⁷ = 22628651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22628773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75787 + ... + 76084.

It is an arithmetic number, because the mean of its divisors is an integer number (5695200).

Almost surely, 2^22628779 is an apocalyptic number.

22628779 is a deficient number, since it is larger than the sum of its proper divisors (152021).

22628779 is a wasteful number, since it uses less digits than its factorization.

22628779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152020.

The product of its digits is 169344, while the sum is 43.

The square root of 22628779 is about 4756.9716206847. The cubic root of 22628779 is about 282.8483873692.

The spelling of 22628779 in words is "twenty-two million, six hundred twenty-eight thousand, seven hundred seventy-nine".