2011839756 has 12 divisors (see below), whose sum is σ = 4694292792. Its totient is φ = 670613248.

The previous prime is 2011839751. The next prime is 2011839763. The reversal of 2011839756 is 6579381102.

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

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2011839751) 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, 83826645 + ... + 83826668.

It is an arithmetic number, because the mean of its divisors is an integer number (391191066).

Almost surely, 2^2011839756 is an apocalyptic number.

It is an amenable number.

2011839756 is an abundant number, since it is smaller than the sum of its proper divisors (2682453036).

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

2011839756 is a wasteful number, since it uses less digits than its factorization.

2011839756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167653320 (or 167653318 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 2011839756 is about 44853.5367167406. The cubic root of 2011839756 is about 1262.4023529484.

The spelling of 2011839756 in words is "two billion, eleven million, eight hundred thirty-nine thousand, seven hundred fifty-six".