28348987 has 2 divisors, whose sum is σ = 28348988. Its totient is φ = 28348986.

The previous prime is 28348967. The next prime is 28349003. The reversal of 28348987 is 78984382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28348987 - 2¹⁵ = 28316219 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28348987.

It is not a weakly prime, because it can be changed into another prime (28348967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14174493 + 14174494.

It is an arithmetic number, because the mean of its divisors is an integer number (14174494).

Almost surely, 2^28348987 is an apocalyptic number.

28348987 is a deficient number, since it is larger than the sum of its proper divisors (1).

28348987 is an equidigital number, since it uses as much as digits as its factorization.

28348987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 49.

The square root of 28348987 is about 5324.3766771332. The cubic root of 28348987 is about 304.9152752216.

The spelling of 28348987 in words is "twenty-eight million, three hundred forty-eight thousand, nine hundred eighty-seven".