28213829787 has 48 divisors (see below), whose sum is σ = 45140451104. Its totient is φ = 15567552000.

The previous prime is 28213829741. The next prime is 28213829803. The reversal of 28213829787 is 78792831282.

It is not a de Polignac number, because 28213829787 - 2⁶ = 28213829723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28213829587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 303537 + ... + 385437.

Almost surely, 2^28213829787 is an apocalyptic number.

28213829787 is a deficient number, since it is larger than the sum of its proper divisors (16926621317).

28213829787 is a wasteful number, since it uses less digits than its factorization.

28213829787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82012 (or 82001 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 57.

The spelling of 28213829787 in words is "twenty-eight billion, two hundred thirteen million, eight hundred twenty-nine thousand, seven hundred eighty-seven".