28311379 has 2 divisors, whose sum is σ = 28311380. Its totient is φ = 28311378.

The previous prime is 28311373. The next prime is 28311391. The reversal of 28311379 is 97311382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28311379 - 2⁷ = 28311251 is a prime.

It is not a weakly prime, because it can be changed into another prime (28311373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14155689 + 14155690.

It is an arithmetic number, because the mean of its divisors is an integer number (14155690).

Almost surely, 2^28311379 is an apocalyptic number.

28311379 is a deficient number, since it is larger than the sum of its proper divisors (1).

28311379 is an equidigital number, since it uses as much as digits as its factorization.

28311379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 28311379 is about 5320.8438240565. The cubic root of 28311379 is about 304.7803811804.

The spelling of 28311379 in words is "twenty-eight million, three hundred eleven thousand, three hundred seventy-nine".