28747100093 has 4 divisors (see below), whose sum is σ = 28866382908. Its totient is φ = 28627817280.

The previous prime is 28747100033. The next prime is 28747100117. The reversal of 28747100093 is 39000174782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11184754564 + 17562345529 = 105758^2 + 132523^2 .

It is a cyclic number.

It is not a de Polignac number, because 28747100093 - 2²⁴ = 28730322877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28747100093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28747100033) 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, 59641046 + ... + 59641527.

It is an arithmetic number, because the mean of its divisors is an integer number (7216595727).

Almost surely, 2^28747100093 is an apocalyptic number.

It is an amenable number.

28747100093 is a deficient number, since it is larger than the sum of its proper divisors (119282815).

28747100093 is a wasteful number, since it uses less digits than its factorization.

28747100093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119282814.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 28747100093 in words is "twenty-eight billion, seven hundred forty-seven million, one hundred thousand, ninety-three".