28755877 has 4 divisors (see below), whose sum is σ = 28767340. Its totient is φ = 28744416.

The previous prime is 28755871. The next prime is 28755967. The reversal of 28755877 is 77855782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 20921476 + 7834401 = 4574^2 + 2799^2 .

It is a cyclic number.

It is not a de Polignac number, because 28755877 - 2¹⁵ = 28723109 is a prime.

It is a super-3 number, since 3×28755877³ (a number of 23 digits) contains 333 as substring.

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 28755877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28755871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168 + ... + 7585.

It is an arithmetic number, because the mean of its divisors is an integer number (7191835).

Almost surely, 2^28755877 is an apocalyptic number.

It is an amenable number.

28755877 is a deficient number, since it is larger than the sum of its proper divisors (11463).

28755877 is an equidigital number, since it uses as much as digits as its factorization.

28755877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11462.

The product of its digits is 1097600, while the sum is 49.

The square root of 28755877 is about 5362.4506524536. The cubic root of 28755877 is about 306.3671565086.

The spelling of 28755877 in words is "twenty-eight million, seven hundred fifty-five thousand, eight hundred seventy-seven".