28299371 has 2 divisors, whose sum is σ = 28299372. Its totient is φ = 28299370.

The previous prime is 28299347. The next prime is 28299377. The reversal of 28299371 is 17399282.

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-28299371 is a prime.

It is not a weakly prime, because it can be changed into another prime (28299377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14149685 + 14149686.

It is an arithmetic number, because the mean of its divisors is an integer number (14149686).

Almost surely, 2^28299371 is an apocalyptic number.

28299371 is a deficient number, since it is larger than the sum of its proper divisors (1).

28299371 is an equidigital number, since it uses as much as digits as its factorization.

28299371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 28299371 is about 5319.7153119316. The cubic root of 28299371 is about 304.7372851946.

The spelling of 28299371 in words is "twenty-eight million, two hundred ninety-nine thousand, three hundred seventy-one".