28175887047 has 48 divisors (see below), whose sum is σ = 47766817152. Its totient is φ = 14608399680.

The previous prime is 28175887031. The next prime is 28175887139. The reversal of 28175887047 is 74078857182.

It is not a de Polignac number, because 28175887047 - 2⁴ = 28175887031 is a prime.

It is a super-2 number, since 2×28175887047² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28175887147) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 829033 + ... + 862349.

It is an arithmetic number, because the mean of its divisors is an integer number (995142024).

Almost surely, 2^28175887047 is an apocalyptic number.

28175887047 is a deficient number, since it is larger than the sum of its proper divisors (19590930105).

28175887047 is a wasteful number, since it uses less digits than its factorization.

28175887047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33868 (or 33861 counting only the distinct ones).

The product of its (nonzero) digits is 7024640, while the sum is 57.

The spelling of 28175887047 in words is "twenty-eight billion, one hundred seventy-five million, eight hundred eighty-seven thousand, forty-seven".