28727578747 has 8 divisors (see below), whose sum is σ = 32861293056. Its totient is φ = 24601308072.

The previous prime is 28727578721. The next prime is 28727578769. The reversal of 28727578747 is 74787572782.

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 28727578747 - 2²³ = 28719190139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28727578787) 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, 1852633 + ... + 1868074.

It is an arithmetic number, because the mean of its divisors is an integer number (4107661632).

Almost surely, 2^28727578747 is an apocalyptic number.

28727578747 is a deficient number, since it is larger than the sum of its proper divisors (4133714309).

28727578747 is a wasteful number, since it uses less digits than its factorization.

28727578747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721817.

The product of its digits is 86051840, while the sum is 64.

The spelling of 28727578747 in words is "twenty-eight billion, seven hundred twenty-seven million, five hundred seventy-eight thousand, seven hundred forty-seven".