28287334331 has 8 divisors (see below), whose sum is σ = 30312155664. Its totient is φ = 26302608640.

The previous prime is 28287334321. The next prime is 28287334333. The reversal of 28287334331 is 13343378282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28287334331 is a prime.

It is a super-2 number, since 2×28287334331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28287334333) 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, 10022450 + ... + 10025271.

It is an arithmetic number, because the mean of its divisors is an integer number (3789019458).

Almost surely, 2^28287334331 is an apocalyptic number.

28287334331 is a deficient number, since it is larger than the sum of its proper divisors (2024821333).

28287334331 is a wasteful number, since it uses less digits than its factorization.

28287334331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20047821.

The product of its digits is 580608, while the sum is 44.

The spelling of 28287334331 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred thirty-four thousand, three hundred thirty-one".