3891887 has 8 divisors (see below), whose sum is σ = 4121040. Its totient is φ = 3669120.

The previous prime is 3891883. The next prime is 3891893. The reversal of 3891887 is 7881983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3891887 - 2² = 3891883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314 + ... + 2807.

It is an arithmetic number, because the mean of its divisors is an integer number (515130).

Almost surely, 2^3891887 is an apocalyptic number.

3891887 is a deficient number, since it is larger than the sum of its proper divisors (229153).

3891887 is a wasteful number, since it uses less digits than its factorization.

3891887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193.

The product of its digits is 96768, while the sum is 44.

The square root of 3891887 is about 1972.7866078215. The cubic root of 3891887 is about 157.2968675463.

The spelling of 3891887 in words is "three million, eight hundred ninety-one thousand, eight hundred eighty-seven".