28284877 has 2 divisors, whose sum is σ = 28284878. Its totient is φ = 28284876.

The previous prime is 28284857. The next prime is 28284887. The reversal of 28284877 is 77848282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17189316 + 11095561 = 4146^2 + 3331^2 .

It is a cyclic number.

It is not a de Polignac number, because 28284877 - 2¹¹ = 28282829 is a prime.

It is a super-3 number, since 3×28284877³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28284847) 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 as a sum of consecutive naturals, namely, 14142438 + 14142439.

It is an arithmetic number, because the mean of its divisors is an integer number (14142439).

Almost surely, 2^28284877 is an apocalyptic number.

It is an amenable number.

28284877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28284877 is an equidigital number, since it uses as much as digits as its factorization.

28284877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 401408, while the sum is 46.

The square root of 28284877 is about 5318.3528465118. The cubic root of 28284877 is about 304.6852508640.

It can be divided in two parts, 28284 and 877, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 28284877 in words is "twenty-eight million, two hundred eighty-four thousand, eight hundred seventy-seven".