28083491 has 2 divisors, whose sum is σ = 28083492. Its totient is φ = 28083490.

The previous prime is 28083479. The next prime is 28083499. The reversal of 28083491 is 19438082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28083491 is a prime.

It is not a weakly prime, because it can be changed into another prime (28083499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14041745 + 14041746.

It is an arithmetic number, because the mean of its divisors is an integer number (14041746).

Almost surely, 2^28083491 is an apocalyptic number.

28083491 is a deficient number, since it is larger than the sum of its proper divisors (1).

28083491 is an equidigital number, since it uses as much as digits as its factorization.

28083491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28083491 is about 5299.3859078199. The cubic root of 28083491 is about 303.9604165624.

The spelling of 28083491 in words is "twenty-eight million, eighty-three thousand, four hundred ninety-one".