2491838 has 8 divisors (see below), whose sum is σ = 3746088. Its totient is φ = 1243144.

The previous prime is 2491837. The next prime is 2491847. The reversal of 2491838 is 8381942.

It is a happy number.

2491838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2491798 and 2491807.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 2232.

It is an arithmetic number, because the mean of its divisors is an integer number (468261).

2^2491838 is an apocalyptic number.

2491838 is a deficient number, since it is larger than the sum of its proper divisors (1254250).

2491838 is a wasteful number, since it uses less digits than its factorization.

2491838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778.

The product of its digits is 13824, while the sum is 35.

The square root of 2491838 is about 1578.5556689582. Note that the first 3 decimals coincide. The cubic root of 2491838 is about 135.5730192894.

The spelling of 2491838 in words is "two million, four hundred ninety-one thousand, eight hundred thirty-eight".