2156832 has 36 divisors (see below), whose sum is σ = 6134310. Its totient is φ = 718848.

The previous prime is 2156813. The next prime is 2156839. The reversal of 2156832 is 2386512.

It can be written as a sum of positive squares in only one way, i.e., 1838736 + 318096 = 1356^2 + 564^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 2156796 and 2156805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3457 + ... + 4032.

2^2156832 is an apocalyptic number.

It is an amenable number.

2156832 is an abundant number, since it is smaller than the sum of its proper divisors (3977478).

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

2156832 is a wasteful number, since it uses less digits than its factorization.

2156832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7505 (or 7494 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2156832 is about 1468.6156747087. The cubic root of 2156832 is about 129.2028537296.

The spelling of 2156832 in words is "two million, one hundred fifty-six thousand, eight hundred thirty-two".