2991156 has 36 divisors (see below), whose sum is σ = 8120448. Its totient is φ = 854448.

The previous prime is 2991143. The next prime is 2991187. The reversal of 2991156 is 6511992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1956 + ... + 3131.

It is an arithmetic number, because the mean of its divisors is an integer number (225568).

2^2991156 is an apocalyptic number.

It is an amenable number.

2991156 is an abundant number, since it is smaller than the sum of its proper divisors (5129292).

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

2991156 is a wasteful number, since it uses less digits than its factorization.

2991156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5108 (or 5099 counting only the distinct ones).

The product of its digits is 4860, while the sum is 33.

The square root of 2991156 is about 1729.4958803073. The cubic root of 2991156 is about 144.0830924759.

The spelling of 2991156 in words is "two million, nine hundred ninety-one thousand, one hundred fifty-six".