28139816284 has 6 divisors (see below), whose sum is σ = 49244678504. Its totient is φ = 14069908140.

The previous prime is 28139816281. The next prime is 28139816293. The reversal of 28139816284 is 48261893182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28139816281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3517477032 + ... + 3517477039.

Almost surely, 2^28139816284 is an apocalyptic number.

It is an amenable number.

28139816284 is a deficient number, since it is larger than the sum of its proper divisors (21104862220).

28139816284 is a wasteful number, since it uses less digits than its factorization.

28139816284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034954075 (or 7034954073 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 52.

The spelling of 28139816284 in words is "twenty-eight billion, one hundred thirty-nine million, eight hundred sixteen thousand, two hundred eighty-four".