28080004813 has 32 divisors (see below), whose sum is σ = 35318433024. Its totient is φ = 21774707712.

The previous prime is 28080004789. The next prime is 28080004831. The reversal of 28080004813 is 31840008082.

It is a cyclic number.

It is not a de Polignac number, because 28080004813 - 2⁹ = 28080004301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28080004853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327031 + ... + 403867.

It is an arithmetic number, because the mean of its divisors is an integer number (1103701032).

Almost surely, 2^28080004813 is an apocalyptic number.

It is an amenable number.

28080004813 is a deficient number, since it is larger than the sum of its proper divisors (7238428211).

28080004813 is a wasteful number, since it uses less digits than its factorization.

28080004813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76981.

The product of its (nonzero) digits is 12288, while the sum is 34.

The spelling of 28080004813 in words is "twenty-eight billion, eighty million, four thousand, eight hundred thirteen".