28983391 has 2 divisors, whose sum is σ = 28983392. Its totient is φ = 28983390.

The previous prime is 28983373. The next prime is 28983401. The reversal of 28983391 is 19338982.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28983391 - 2⁵ = 28983359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28983371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14491695 + 14491696.

It is an arithmetic number, because the mean of its divisors is an integer number (14491696).

Almost surely, 2^28983391 is an apocalyptic number.

28983391 is a deficient number, since it is larger than the sum of its proper divisors (1).

28983391 is an equidigital number, since it uses as much as digits as its factorization.

28983391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 28983391 is about 5383.6224793349. The cubic root of 28983391 is about 307.1730183675.

The spelling of 28983391 in words is "twenty-eight million, nine hundred eighty-three thousand, three hundred ninety-one".