28422077 has 4 divisors (see below), whose sum is σ = 28682940. Its totient is φ = 28161216.

The previous prime is 28422073. The next prime is 28422083. The reversal of 28422077 is 77022482.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22714756 + 5707321 = 4766^2 + 2389^2 .

It is a cyclic number.

It is not a de Polignac number, because 28422077 - 2² = 28422073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28422073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130268 + ... + 130485.

It is an arithmetic number, because the mean of its divisors is an integer number (7170735).

Almost surely, 2^28422077 is an apocalyptic number.

It is an amenable number.

28422077 is a deficient number, since it is larger than the sum of its proper divisors (260863).

28422077 is a wasteful number, since it uses less digits than its factorization.

28422077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260862.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 28422077 is about 5331.2359730179. The cubic root of 28422077 is about 305.1770968272.

The spelling of 28422077 in words is "twenty-eight million, four hundred twenty-two thousand, seventy-seven".