2491684 has 12 divisors (see below), whose sum is σ = 4695964. Its totient is φ = 1149984.

The previous prime is 2491681. The next prime is 2491711. The reversal of 2491684 is 4861942.

It can be written as a sum of positive squares in 2 ways, for example, as 324900 + 2166784 = 570^2 + 1472^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2491681) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 23907 + ... + 24010.

2^2491684 is an apocalyptic number.

It is an amenable number.

2491684 is a deficient number, since it is larger than the sum of its proper divisors (2204280).

2491684 is a wasteful number, since it uses less digits than its factorization.

2491684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47934 (or 47932 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 2491684 is about 1578.5068894370. The cubic root of 2491684 is about 135.5702263477.

The spelling of 2491684 in words is "two million, four hundred ninety-one thousand, six hundred eighty-four".