28775122 has 16 divisors (see below), whose sum is σ = 44542080. Its totient is φ = 13931568.

The previous prime is 28775113. The next prime is 28775129. The reversal of 28775122 is 22157782.

It is a super-2 number, since 2×28775122² = 1656015292229768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28775129) 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 7 ways as a sum of consecutive naturals, for example, 16873 + ... + 18499.

It is an arithmetic number, because the mean of its divisors is an integer number (2783880).

Almost surely, 2^28775122 is an apocalyptic number.

28775122 is a deficient number, since it is larger than the sum of its proper divisors (15766958).

28775122 is a wasteful number, since it uses less digits than its factorization.

28775122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905.

The product of its digits is 15680, while the sum is 34.

The square root of 28775122 is about 5364.2447744300. The cubic root of 28775122 is about 306.4354871331.

The spelling of 28775122 in words is "twenty-eight million, seven hundred seventy-five thousand, one hundred twenty-two".