28947784327 has 24 divisors (see below), whose sum is σ = 36697892000. Its totient is φ = 22349701440.

The previous prime is 28947784321. The next prime is 28947784339. The reversal of 28947784327 is 72348774982.

It is not a de Polignac number, because 28947784327 - 2³ = 28947784319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28947784321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64452 + ... + 249097.

Almost surely, 2^28947784327 is an apocalyptic number.

28947784327 is a deficient number, since it is larger than the sum of its proper divisors (7750107673).

28947784327 is a wasteful number, since it uses less digits than its factorization.

28947784327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313687 (or 313676 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 61.

The spelling of 28947784327 in words is "twenty-eight billion, nine hundred forty-seven million, seven hundred eighty-four thousand, three hundred twenty-seven".