28963809897 has 16 divisors (see below), whose sum is σ = 42187806720. Its totient is φ = 17529395600.

The previous prime is 28963809883. The next prime is 28963809899. The reversal of 28963809897 is 79890836982.

It is a cyclic number.

It is not a de Polignac number, because 28963809897 - 2¹¹ = 28963807849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28963809899) 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, 586629 + ... + 634082.

It is an arithmetic number, because the mean of its divisors is an integer number (2636737920).

Almost surely, 2^28963809897 is an apocalyptic number.

It is an amenable number.

28963809897 is a deficient number, since it is larger than the sum of its proper divisors (13223996823).

28963809897 is a wasteful number, since it uses less digits than its factorization.

28963809897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221444.

The product of its (nonzero) digits is 94058496, while the sum is 69.

The spelling of 28963809897 in words is "twenty-eight billion, nine hundred sixty-three million, eight hundred nine thousand, eight hundred ninety-seven".