1000028891187 has 16 divisors (see below), whose sum is σ = 1489280962560. Its totient is φ = 663195421800.

The previous prime is 1000028891177. The next prime is 1000028891219. The reversal of 1000028891187 is 7811988200001.

It is a happy number.

1000028891187 is a `hidden beast` number, since 100 + 0 + 0 + 288 + 91 + 187 = 666.

It is not a de Polignac number, because 1000028891187 - 2¹⁶ = 1000028825651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000028891107) 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, 96953239 + ... + 96963552.

It is an arithmetic number, because the mean of its divisors is an integer number (93080060160).

Almost surely, 2^{1000028891187} is an apocalyptic number.

1000028891187 is a deficient number, since it is larger than the sum of its proper divisors (489252071373).

1000028891187 is a wasteful number, since it uses less digits than its factorization.

1000028891187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193916991 (or 193916985 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 45.

The spelling of 1000028891187 in words is "one trillion, twenty-eight million, eight hundred ninety-one thousand, one hundred eighty-seven".