3891087189 has 24 divisors (see below), whose sum is σ = 6134454144. Its totient is φ = 2357064000.

The previous prime is 3891087181. The next prime is 3891087217. The reversal of 3891087189 is 9817801983.

3891087189 is a `hidden beast` number, since 389 + 1 + 0 + 87 + 189 = 666.

It is not a de Polignac number, because 3891087189 - 2³ = 3891087181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891087181) 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, 217204 + ... + 234434.

It is an arithmetic number, because the mean of its divisors is an integer number (255602256).

Almost surely, 2^3891087189 is an apocalyptic number.

It is an amenable number.

3891087189 is a deficient number, since it is larger than the sum of its proper divisors (2243366955).

3891087189 is a wasteful number, since it uses less digits than its factorization.

3891087189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19529 (or 19526 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 54.

The square root of 3891087189 is about 62378.5795686308. The cubic root of 3891087189 is about 1572.8609159246.

The spelling of 3891087189 in words is "three billion, eight hundred ninety-one million, eighty-seven thousand, one hundred eighty-nine".