28802591 has 2 divisors, whose sum is σ = 28802592. Its totient is φ = 28802590.

The previous prime is 28802569. The next prime is 28802593. The reversal of 28802591 is 19520882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28802591 is a prime.

Together with 28802593, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1788209 and since 28802591 and 1788209 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28802593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14401295 + 14401296.

It is an arithmetic number, because the mean of its divisors is an integer number (14401296).

Almost surely, 2^28802591 is an apocalyptic number.

28802591 is a deficient number, since it is larger than the sum of its proper divisors (1).

28802591 is an equidigital number, since it uses as much as digits as its factorization.

28802591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 28802591 is about 5366.8045427424. The cubic root of 28802591 is about 306.5329648472.

The spelling of 28802591 in words is "twenty-eight million, eight hundred two thousand, five hundred ninety-one".