28187084847 has 16 divisors (see below), whose sum is σ = 38884515840. Its totient is φ = 18140714592.

The previous prime is 28187084759. The next prime is 28187084909. The reversal of 28187084847 is 74848078182.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-28187084847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28187064847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 683538 + ... + 723600.

It is an arithmetic number, because the mean of its divisors is an integer number (2430282240).

Almost surely, 2^28187084847 is an apocalyptic number.

28187084847 is a deficient number, since it is larger than the sum of its proper divisors (10697430993).

28187084847 is a wasteful number, since it uses less digits than its factorization.

28187084847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48182.

The product of its (nonzero) digits is 6422528, while the sum is 57.

The spelling of 28187084847 in words is "twenty-eight billion, one hundred eighty-seven million, eighty-four thousand, eight hundred forty-seven".