28265877 has 6 divisors (see below), whose sum is σ = 40828502. Its totient is φ = 18843912.

The previous prime is 28265843. The next prime is 28265879. The reversal of 28265877 is 77856282.

It can be written as a sum of positive squares in only one way, i.e., 23561316 + 4704561 = 4854^2 + 2169^2 .

It is not a de Polignac number, because 28265877 - 2⁸ = 28265621 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 (28265879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1570318 + ... + 1570335.

Almost surely, 2^28265877 is an apocalyptic number.

It is an amenable number.

28265877 is a deficient number, since it is larger than the sum of its proper divisors (12562625).

28265877 is a wasteful number, since it uses less digits than its factorization.

28265877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140659 (or 3140656 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 28265877 is about 5316.5662790941. The cubic root of 28265877 is about 304.6170127912.

The spelling of 28265877 in words is "twenty-eight million, two hundred sixty-five thousand, eight hundred seventy-seven".