28465678391 has 2 divisors, whose sum is σ = 28465678392. Its totient is φ = 28465678390.

The previous prime is 28465678379. The next prime is 28465678411. The reversal of 28465678391 is 19387656482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28465678391 - 2²² = 28461484087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28465678391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28465675391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14232839195 + 14232839196.

It is an arithmetic number, because the mean of its divisors is an integer number (14232839196).

Almost surely, 2^28465678391 is an apocalyptic number.

28465678391 is a deficient number, since it is larger than the sum of its proper divisors (1).

28465678391 is an equidigital number, since it uses as much as digits as its factorization.

28465678391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 59.

The spelling of 28465678391 in words is "twenty-eight billion, four hundred sixty-five million, six hundred seventy-eight thousand, three hundred ninety-one".