3891158 has 4 divisors (see below), whose sum is σ = 5836740. Its totient is φ = 1945578.

The previous prime is 3891157. The next prime is 3891161. The reversal of 3891158 is 8511983.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×3891158² = 30282221161928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972788 + ... + 972791.

It is an arithmetic number, because the mean of its divisors is an integer number (1459185).

Almost surely, 2^3891158 is an apocalyptic number.

3891158 is a deficient number, since it is larger than the sum of its proper divisors (1945582).

3891158 is a wasteful number, since it uses less digits than its factorization.

3891158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945581.

The product of its digits is 8640, while the sum is 35.

The square root of 3891158 is about 1972.6018351406. The cubic root of 3891158 is about 157.2870456975.

The spelling of 3891158 in words is "three million, eight hundred ninety-one thousand, one hundred fifty-eight".