2491836 has 12 divisors (see below), whose sum is σ = 5814312. Its totient is φ = 830608.

The previous prime is 2491829. The next prime is 2491837. The reversal of 2491836 is 6381942.

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

It is a junction number, because it is equal to n+sod(n) for n = 2491797 and 2491806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491837) 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, 103815 + ... + 103838.

It is an arithmetic number, because the mean of its divisors is an integer number (484526).

2^2491836 is an apocalyptic number.

It is an amenable number.

2491836 is an abundant number, since it is smaller than the sum of its proper divisors (3322476).

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

2491836 is a wasteful number, since it uses less digits than its factorization.

2491836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207660 (or 207658 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 2491836 is about 1578.5550354676. Note that the first 3 decimals coincide. The cubic root of 2491836 is about 135.5729830182.

The spelling of 2491836 in words is "two million, four hundred ninety-one thousand, eight hundred thirty-six".