22775428 has 48 divisors (see below), whose sum is σ = 45440640. Its totient is φ = 9909504.

The previous prime is 22775419. The next prime is 22775429. The reversal of 22775428 is 82457722.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22775429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163783 + ... + 163921.

It is an arithmetic number, because the mean of its divisors is an integer number (946680).

Almost surely, 2^22775428 is an apocalyptic number.

It is an amenable number.

22775428 is a deficient number, since it is larger than the sum of its proper divisors (22665212).

22775428 is a wasteful number, since it uses less digits than its factorization.

22775428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 314 counting only the distinct ones).

The product of its digits is 62720, while the sum is 37.

The square root of 22775428 is about 4772.3608413447. The cubic root of 22775428 is about 283.4580851636.

The spelling of 22775428 in words is "twenty-two million, seven hundred seventy-five thousand, four hundred twenty-eight".