28805764763 has 4 divisors (see below), whose sum is σ = 28807201248. Its totient is φ = 28804328280.

The previous prime is 28805764693. The next prime is 28805764769. The reversal of 28805764763 is 36746750882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36746750882 = 2 ⋅18373375441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28805764763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28805764699 and 28805764708.

It is not an unprimeable number, because it can be changed into a prime (28805764769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687731 + ... + 728412.

It is an arithmetic number, because the mean of its divisors is an integer number (7201800312).

Almost surely, 2^28805764763 is an apocalyptic number.

28805764763 is a deficient number, since it is larger than the sum of its proper divisors (1436485).

28805764763 is a wasteful number, since it uses less digits than its factorization.

28805764763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436484.

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 28805764763 in words is "twenty-eight billion, eight hundred five million, seven hundred sixty-four thousand, seven hundred sixty-three".