28740791 has 2 divisors, whose sum is σ = 28740792. Its totient is φ = 28740790.

The previous prime is 28740781. The next prime is 28740799. The reversal of 28740791 is 19704782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28740791 is a prime.

It is a Chen prime.

It is equal to p_1784639 and since 28740791 and 1784639 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28740799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14370395 + 14370396.

It is an arithmetic number, because the mean of its divisors is an integer number (14370396).

Almost surely, 2^28740791 is an apocalyptic number.

28740791 is a deficient number, since it is larger than the sum of its proper divisors (1).

28740791 is an equidigital number, since it uses as much as digits as its factorization.

28740791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 28740791 is about 5361.0438349262. The cubic root of 28740791 is about 306.3135713649.

The spelling of 28740791 in words is "twenty-eight million, seven hundred forty thousand, seven hundred ninety-one".