28471787316 has 54 divisors (see below), whose sum is σ = 83720617890. Its totient is φ = 8134795872.

The previous prime is 28471787293. The next prime is 28471787339. The reversal of 28471787316 is 61378717482.

28471787316 is a `hidden beast` number, since 28 + 471 + 78 + 73 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (28471787293) and next prime (28471787339).

It can be written as a sum of positive squares in only one way, i.e., 19058906916 + 9412880400 = 138054^2 + 97020^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8068471 + ... + 8071998.

Almost surely, 2^28471787316 is an apocalyptic number.

It is an amenable number.

28471787316 is an abundant number, since it is smaller than the sum of its proper divisors (55248830574).

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

28471787316 is a wasteful number, since it uses less digits than its factorization.

28471787316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16140493 (or 16140481 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The spelling of 28471787316 in words is "twenty-eight billion, four hundred seventy-one million, seven hundred eighty-seven thousand, three hundred sixteen".