2156836 has 12 divisors (see below), whose sum is σ = 4117680. Its totient is φ = 980360.

The previous prime is 2156813. The next prime is 2156839. The reversal of 2156836 is 6386512.

It is a junction number, because it is equal to n+sod(n) for n = 2156798 and 2156807.

It is not an unprimeable number, because it can be changed into a prime (2156839) 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, 24466 + ... + 24553.

It is an arithmetic number, because the mean of its divisors is an integer number (343140).

2^2156836 is an apocalyptic number.

It is an amenable number.

2156836 is a deficient number, since it is larger than the sum of its proper divisors (1960844).

2156836 is a wasteful number, since it uses less digits than its factorization.

2156836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49034 (or 49032 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 2156836 is about 1468.6170365347. The cubic root of 2156836 is about 129.2029336016.

It can be divided in two parts, 2156 and 836, that added together give a palindrome (2992).

The spelling of 2156836 in words is "two million, one hundred fifty-six thousand, eight hundred thirty-six".