28393012291 has 8 divisors (see below), whose sum is σ = 32474109024. Its totient is φ = 24318153600.

The previous prime is 28393012243. The next prime is 28393012309. The reversal of 28393012291 is 19221039382.

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 28393012291 - 2⁷ = 28393012163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28393012211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1549750 + ... + 1567963.

It is an arithmetic number, because the mean of its divisors is an integer number (4059263628).

Almost surely, 2^28393012291 is an apocalyptic number.

28393012291 is a deficient number, since it is larger than the sum of its proper divisors (4081096733).

28393012291 is a wasteful number, since it uses less digits than its factorization.

28393012291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119021.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 28393012291 in words is "twenty-eight billion, three hundred ninety-three million, twelve thousand, two hundred ninety-one".