2011956 has 12 divisors (see below), whose sum is σ = 4694592. Its totient is φ = 670648.

The previous prime is 2011951. The next prime is 2011957. The reversal of 2011956 is 6591102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83820 + ... + 83843.

It is an arithmetic number, because the mean of its divisors is an integer number (391216).

2^2011956 is an apocalyptic number.

It is an amenable number.

2011956 is an abundant number, since it is smaller than the sum of its proper divisors (2682636).

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

2011956 is a wasteful number, since it uses less digits than its factorization.

2011956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167670 (or 167668 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 2011956 is about 1418.4343481459. The cubic root of 2011956 is about 126.2426666328.

The spelling of 2011956 in words is "two million, eleven thousand, nine hundred fifty-six".