28664891835 has 16 divisors (see below), whose sum is σ = 47857906944. Its totient is φ = 14623248992.

The previous prime is 28664891833. The next prime is 28664891837. The reversal of 28664891835 is 53819846682.

It is an interprime number because it is at equal distance from previous prime (28664891833) and next prime (28664891837).

It is a cyclic number.

It is not a de Polignac number, because 28664891835 - 2¹ = 28664891833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28664891833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41542977 + ... + 41543666.

It is an arithmetic number, because the mean of its divisors is an integer number (2991119184).

Almost surely, 2^28664891835 is an apocalyptic number.

28664891835 is a deficient number, since it is larger than the sum of its proper divisors (19193015109).

28664891835 is a wasteful number, since it uses less digits than its factorization.

28664891835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83086674.

The product of its digits is 19906560, while the sum is 60.

The spelling of 28664891835 in words is "twenty-eight billion, six hundred sixty-four million, eight hundred ninety-one thousand, eight hundred thirty-five".