28385803287 has 24 divisors (see below), whose sum is σ = 42790971600. Its totient is φ = 18109609728.

The previous prime is 28385803283. The next prime is 28385803289. The reversal of 28385803287 is 78230858382.

It is a happy number.

28385803287 is a `hidden beast` number, since 2 + 8 + 38 + 580 + 3 + 28 + 7 = 666.

It is not a de Polignac number, because 28385803287 - 2² = 28385803283 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28385803283) 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, 451737 + ... + 510722.

It is an arithmetic number, because the mean of its divisors is an integer number (1782957150).

Almost surely, 2^28385803287 is an apocalyptic number.

28385803287 is a deficient number, since it is larger than the sum of its proper divisors (14405168313).

28385803287 is a wasteful number, since it uses less digits than its factorization.

28385803287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962607 (or 962604 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 28385803287 in words is "twenty-eight billion, three hundred eighty-five million, eight hundred three thousand, two hundred eighty-seven".