28130780311 has 8 divisors (see below), whose sum is σ = 30012904944. Its totient is φ = 26273919360.

The previous prime is 28130780309. The next prime is 28130780329. The reversal of 28130780311 is 11308703182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28130780311 - 2¹ = 28130780309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28130780341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6313620 + ... + 6318073.

It is an arithmetic number, because the mean of its divisors is an integer number (3751613118).

Almost surely, 2^28130780311 is an apocalyptic number.

28130780311 is a deficient number, since it is larger than the sum of its proper divisors (1882124633).

28130780311 is a wasteful number, since it uses less digits than its factorization.

28130780311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12631841.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 28130780311 in words is "twenty-eight billion, one hundred thirty million, seven hundred eighty thousand, three hundred eleven".