22776428 has 12 divisors (see below), whose sum is σ = 40025832. Its totient is φ = 11340480.

The previous prime is 22776427. The next prime is 22776431. The reversal of 22776428 is 82467722.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22776391 and 22776400.

It is not an unprimeable number, because it can be changed into a prime (22776427) 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, 10850 + ... + 12777.

It is an arithmetic number, because the mean of its divisors is an integer number (3335486).

Almost surely, 2^22776428 is an apocalyptic number.

It is an amenable number.

22776428 is a deficient number, since it is larger than the sum of its proper divisors (17249404).

22776428 is a wasteful number, since it uses less digits than its factorization.

22776428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23872 (or 23870 counting only the distinct ones).

The product of its digits is 75264, while the sum is 38.

The square root of 22776428 is about 4772.4656101433. The cubic root of 22776428 is about 283.4622336980.

The spelling of 22776428 in words is "twenty-two million, seven hundred seventy-six thousand, four hundred twenty-eight".