28587253 has 2 divisors, whose sum is σ = 28587254. Its totient is φ = 28587252.

The previous prime is 28587203. The next prime is 28587257. The reversal of 28587253 is 35278582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28483569 + 103684 = 5337^2 + 322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28587253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28587257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14293626 + 14293627.

It is an arithmetic number, because the mean of its divisors is an integer number (14293627).

Almost surely, 2^28587253 is an apocalyptic number.

It is an amenable number.

28587253 is a deficient number, since it is larger than the sum of its proper divisors (1).

28587253 is an equidigital number, since it uses as much as digits as its factorization.

28587253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134400, while the sum is 40.

The square root of 28587253 is about 5346.7048730971. The cubic root of 28587253 is about 305.7671381178.

The spelling of 28587253 in words is "twenty-eight million, five hundred eighty-seven thousand, two hundred fifty-three".