28857460391 has 2 divisors, whose sum is σ = 28857460392. Its totient is φ = 28857460390.

The previous prime is 28857460369. The next prime is 28857460427. The reversal of 28857460391 is 19306475882.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28857460391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28857760391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14428730195 + 14428730196.

It is an arithmetic number, because the mean of its divisors is an integer number (14428730196).

It is a 1-persistent number, because it is pandigital, but 2⋅28857460391 = 57714920782 is not.

Almost surely, 2^28857460391 is an apocalyptic number.

28857460391 is a deficient number, since it is larger than the sum of its proper divisors (1).

28857460391 is an equidigital number, since it uses as much as digits as its factorization.

28857460391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 28857460391 in words is "twenty-eight billion, eight hundred fifty-seven million, four hundred sixty thousand, three hundred ninety-one".