2091836 has 6 divisors (see below), whose sum is σ = 3660720. Its totient is φ = 1045916.

The previous prime is 2091809. The next prime is 2091839. The reversal of 2091836 is 6381902.

It is a junction number, because it is equal to n+sod(n) for n = 2091799 and 2091808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261476 + ... + 261483.

It is an arithmetic number, because the mean of its divisors is an integer number (610120).

2^2091836 is an apocalyptic number.

It is an amenable number.

2091836 is a deficient number, since it is larger than the sum of its proper divisors (1568884).

2091836 is a wasteful number, since it uses less digits than its factorization.

2091836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522963 (or 522961 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2091836 is about 1446.3180839636. The cubic root of 2091836 is about 127.8917541887.

The spelling of 2091836 in words is "two million, ninety-one thousand, eight hundred thirty-six".