28572877 has 6 divisors (see below), whose sum is σ = 29869742. Its totient is φ = 27330072.

The previous prime is 28572871. The next prime is 28572889. The reversal of 28572877 is 77827582.

It can be written as a sum of positive squares in only one way, i.e., 18498601 + 10074276 = 4301^2 + 3174^2 .

It is not a de Polignac number, because 28572877 - 2⁷ = 28572749 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 (28572871) 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 5 ways as a sum of consecutive naturals, for example, 26478 + ... + 27535.

Almost surely, 2^28572877 is an apocalyptic number.

It is an amenable number.

28572877 is a deficient number, since it is larger than the sum of its proper divisors (1296865).

28572877 is an equidigital number, since it uses as much as digits as its factorization.

28572877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54059 (or 54036 counting only the distinct ones).

The product of its digits is 439040, while the sum is 46.

The square root of 28572877 is about 5345.3603246180. The cubic root of 28572877 is about 305.7158746470.

The spelling of 28572877 in words is "twenty-eight million, five hundred seventy-two thousand, eight hundred seventy-seven".