28626791 has 2 divisors, whose sum is σ = 28626792. Its totient is φ = 28626790.

The previous prime is 28626781. The next prime is 28626797. The reversal of 28626791 is 19762682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28626791 - 2¹⁸ = 28364647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28626797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14313395 + 14313396.

It is an arithmetic number, because the mean of its divisors is an integer number (14313396).

Almost surely, 2^28626791 is an apocalyptic number.

28626791 is a deficient number, since it is larger than the sum of its proper divisors (1).

28626791 is an equidigital number, since it uses as much as digits as its factorization.

28626791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 28626791 is about 5350.4010130083. The cubic root of 28626791 is about 305.9080383517.

The spelling of 28626791 in words is "twenty-eight million, six hundred twenty-six thousand, seven hundred ninety-one".