28939712284 has 12 divisors (see below), whose sum is σ = 57879424624. Its totient is φ = 12402733824.

The previous prime is 28939712267. The next prime is 28939712297. The reversal of 28939712284 is 48221793982.

28939712284 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516780549 + ... + 516780604.

Almost surely, 2^28939712284 is an apocalyptic number.

It is an amenable number.

28939712284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28939712284 is a wasteful number, since it uses less digits than its factorization.

28939712284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033561164 (or 1033561162 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The spelling of 28939712284 in words is "twenty-eight billion, nine hundred thirty-nine million, seven hundred twelve thousand, two hundred eighty-four".