28900845647 has 2 divisors, whose sum is σ = 28900845648. Its totient is φ = 28900845646.

The previous prime is 28900845613. The next prime is 28900845671. The reversal of 28900845647 is 74654800982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28900845647 - 2²⁴ = 28884068431 is a prime.

It is a super-2 number, since 2×28900845647² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28900844647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14450422823 + 14450422824.

It is an arithmetic number, because the mean of its divisors is an integer number (14450422824).

Almost surely, 2^28900845647 is an apocalyptic number.

28900845647 is a deficient number, since it is larger than the sum of its proper divisors (1).

28900845647 is an equidigital number, since it uses as much as digits as its factorization.

28900845647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 28900845647 in words is "twenty-eight billion, nine hundred million, eight hundred forty-five thousand, six hundred forty-seven".