28587887 has 2 divisors, whose sum is σ = 28587888. Its totient is φ = 28587886.

The previous prime is 28587883. The next prime is 28587893. The reversal of 28587887 is 78878582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28587887 - 2² = 28587883 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28587883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14293943 + 14293944.

It is an arithmetic number, because the mean of its divisors is an integer number (14293944).

Almost surely, 2^28587887 is an apocalyptic number.

28587887 is a deficient number, since it is larger than the sum of its proper divisors (1).

28587887 is an equidigital number, since it uses as much as digits as its factorization.

28587887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2007040, while the sum is 53.

The square root of 28587887 is about 5346.7641616215. The cubic root of 28587887 is about 305.7693985067.

The spelling of 28587887 in words is "twenty-eight million, five hundred eighty-seven thousand, eight hundred eighty-seven".