2491744 has 12 divisors (see below), whose sum is σ = 4905684. Its totient is φ = 1245856.

The previous prime is 2491729. The next prime is 2491757. The reversal of 2491744 is 4471942.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38902 + ... + 38965.

It is an arithmetic number, because the mean of its divisors is an integer number (408807).

2^2491744 is an apocalyptic number.

It is an amenable number.

2491744 is a deficient number, since it is larger than the sum of its proper divisors (2413940).

2491744 is an equidigital number, since it uses as much as digits as its factorization.

2491744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77877 (or 77869 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 2491744 is about 1578.5258946245. The cubic root of 2491744 is about 135.5713145205.

The spelling of 2491744 in words is "two million, four hundred ninety-one thousand, seven hundred forty-four".