28882991 has 2 divisors, whose sum is σ = 28882992. Its totient is φ = 28882990.

The previous prime is 28882981. The next prime is 28882993. The reversal of 28882991 is 19928882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28882991 - 2²² = 24688687 is a prime.

Together with 28882993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28882993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14441495 + 14441496.

It is an arithmetic number, because the mean of its divisors is an integer number (14441496).

Almost surely, 2^28882991 is an apocalyptic number.

28882991 is a deficient number, since it is larger than the sum of its proper divisors (1).

28882991 is an equidigital number, since it uses as much as digits as its factorization.

28882991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 47.

The square root of 28882991 is about 5374.2898135475. The cubic root of 28882991 is about 306.8179201621.

The spelling of 28882991 in words is "twenty-eight million, eight hundred eighty-two thousand, nine hundred ninety-one".