6891156 has 30 divisors (see below), whose sum is σ = 18015690. Its totient is φ = 2296944.

The previous prime is 6891149. The next prime is 6891161. The reversal of 6891156 is 6511986.

It can be written as a sum of positive squares in only one way, i.e., 6081156 + 810000 = 2466^2 + 900^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6891156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10311 + ... + 10958.

It is an arithmetic number, because the mean of its divisors is an integer number (600523).

Almost surely, 2^6891156 is an apocalyptic number.

It is an amenable number.

6891156 is an abundant number, since it is smaller than the sum of its proper divisors (11124534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6891156 is a wasteful number, since it uses less digits than its factorization.

6891156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21285 (or 21274 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 6891156 is about 2625.1011409087. The cubic root of 6891156 is about 190.2964531836.

The spelling of 6891156 in words is "six million, eight hundred ninety-one thousand, one hundred fifty-six".