28043795187 has 32 divisors (see below), whose sum is σ = 44115140160. Its totient is φ = 17546158080.

The previous prime is 28043795179. The next prime is 28043795231. The reversal of 28043795187 is 78159734082.

It is a happy number.

28043795187 is a `hidden beast` number, since 2 + 80 + 43 + 7 + 9 + 518 + 7 = 666.

It is not a de Polignac number, because 28043795187 - 2³ = 28043795179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28043795147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75487 + ... + 248567.

It is an arithmetic number, because the mean of its divisors is an integer number (1378598130).

Almost surely, 2^28043795187 is an apocalyptic number.

28043795187 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28043795187 is a deficient number, since it is larger than the sum of its proper divisors (16071344973).

28043795187 is a wasteful number, since it uses less digits than its factorization.

28043795187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173460 (or 173454 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 28043795187 in words is "twenty-eight billion, forty-three million, seven hundred ninety-five thousand, one hundred eighty-seven".