28355122 has 4 divisors (see below), whose sum is σ = 42532686. Its totient is φ = 14177560.

The previous prime is 28355083. The next prime is 28355123. The reversal of 28355122 is 22155382.

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

It can be written as a sum of positive squares in only one way, i.e., 24710841 + 3644281 = 4971^2 + 1909^2 .

It is not an unprimeable number, because it can be changed into a prime (28355123) 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 as a sum of consecutive naturals, namely, 7088779 + ... + 7088782.

Almost surely, 2^28355122 is an apocalyptic number.

28355122 is a deficient number, since it is larger than the sum of its proper divisors (14177564).

28355122 is a wasteful number, since it uses less digits than its factorization.

28355122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14177563.

The product of its digits is 4800, while the sum is 28.

The square root of 28355122 is about 5324.9527697436. The cubic root of 28355122 is about 304.9372691914.

The spelling of 28355122 in words is "twenty-eight million, three hundred fifty-five thousand, one hundred twenty-two".