2157836 has 12 divisors (see below), whose sum is σ = 3804360. Its totient is φ = 1070880.

The previous prime is 2157833. The next prime is 2157839. The reversal of 2157836 is 6387512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2157833) and next prime (2157839).

It is not an unprimeable number, because it can be changed into a prime (2157833) 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, 1385 + ... + 2496.

It is an arithmetic number, because the mean of its divisors is an integer number (317030).

2^2157836 is an apocalyptic number.

It is an amenable number.

2157836 is a deficient number, since it is larger than the sum of its proper divisors (1646524).

2157836 is a wasteful number, since it uses less digits than its factorization.

2157836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4024 (or 4022 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 2157836 is about 1468.9574534342. The cubic root of 2157836 is about 129.2228984901. Note that the first 3 decimals are identical.

The spelling of 2157836 in words is "two million, one hundred fifty-seven thousand, eight hundred thirty-six".