28855877 has 2 divisors, whose sum is σ = 28855878. Its totient is φ = 28855876.

The previous prime is 28855873. The next prime is 28855901. The reversal of 28855877 is 77855882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 988036 = 5279^2 + 994^2 .

It is a cyclic number.

It is not a de Polignac number, because 28855877 - 2² = 28855873 is a prime.

It is a super-3 number, since 3×28855877³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28855873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14427938 + 14427939.

It is an arithmetic number, because the mean of its divisors is an integer number (14427939).

Almost surely, 2^28855877 is an apocalyptic number.

It is an amenable number.

28855877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28855877 is an equidigital number, since it uses as much as digits as its factorization.

28855877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1254400, while the sum is 50.

The square root of 28855877 is about 5371.7666553937. The cubic root of 28855877 is about 306.7218813362.

It can be divided in two parts, 288 and 55877, that added together give a palindrome (56165).

The spelling of 28855877 in words is "twenty-eight million, eight hundred fifty-five thousand, eight hundred seventy-seven".