28252577 has 4 divisors (see below), whose sum is σ = 28715796. Its totient is φ = 27789360.

The previous prime is 28252573. The next prime is 28252603. The reversal of 28252577 is 77525282.

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 14776336 + 13476241 = 3844^2 + 3671^2 .

It is a cyclic number.

It is not a de Polignac number, because 28252577 - 2² = 28252573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28252577.

It is not an unprimeable number, because it can be changed into a prime (28252573) 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, 231518 + ... + 231639.

It is an arithmetic number, because the mean of its divisors is an integer number (7178949).

Almost surely, 2^28252577 is an apocalyptic number.

It is an amenable number.

28252577 is a deficient number, since it is larger than the sum of its proper divisors (463219).

28252577 is an equidigital number, since it uses as much as digits as its factorization.

28252577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463218.

The product of its digits is 78400, while the sum is 38.

The square root of 28252577 is about 5315.3153246068. The cubic root of 28252577 is about 304.5692279436.

The spelling of 28252577 in words is "twenty-eight million, two hundred fifty-two thousand, five hundred seventy-seven".