28285177 has 2 divisors, whose sum is σ = 28285178. Its totient is φ = 28285176.

The previous prime is 28285171. The next prime is 28285181. The reversal of 28285177 is 77158282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19927296 + 8357881 = 4464^2 + 2891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28285177 is a prime.

It is not a weakly prime, because it can be changed into another prime (28285171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142588 + 14142589.

It is an arithmetic number, because the mean of its divisors is an integer number (14142589).

Almost surely, 2^28285177 is an apocalyptic number.

It is an amenable number.

28285177 is a deficient number, since it is larger than the sum of its proper divisors (1).

28285177 is an equidigital number, since it uses as much as digits as its factorization.

28285177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62720, while the sum is 40.

The square root of 28285177 is about 5318.3810506582. The cubic root of 28285177 is about 304.6863280621.

The spelling of 28285177 in words is "twenty-eight million, two hundred eighty-five thousand, one hundred seventy-seven".