28768013 has 2 divisors, whose sum is σ = 28768014. Its totient is φ = 28768012.

The previous prime is 28767983. The next prime is 28768021. The reversal of 28768013 is 31086782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27175369 + 1592644 = 5213^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 28768013 - 2¹⁰ = 28766989 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 (28768073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14384006 + 14384007.

It is an arithmetic number, because the mean of its divisors is an integer number (14384007).

Almost surely, 2^28768013 is an apocalyptic number.

It is an amenable number.

28768013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28768013 is an equidigital number, since it uses as much as digits as its factorization.

28768013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28768013 is about 5363.5821052726. The cubic root of 28768013 is about 306.4102497156.

The spelling of 28768013 in words is "twenty-eight million, seven hundred sixty-eight thousand, thirteen".