28376813 has 2 divisors, whose sum is σ = 28376814. Its totient is φ = 28376812.

The previous prime is 28376771. The next prime is 28376839. The reversal of 28376813 is 31867382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20994724 + 7382089 = 4582^2 + 2717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28376813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28376713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14188406 + 14188407.

It is an arithmetic number, because the mean of its divisors is an integer number (14188407).

Almost surely, 2^28376813 is an apocalyptic number.

It is an amenable number.

28376813 is a deficient number, since it is larger than the sum of its proper divisors (1).

28376813 is an equidigital number, since it uses as much as digits as its factorization.

28376813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 28376813 is about 5326.9891120595. The cubic root of 28376813 is about 305.0150059803.

The spelling of 28376813 in words is "twenty-eight million, three hundred seventy-six thousand, eight hundred thirteen".