2491944 has 96 divisors (see below), whose sum is σ = 7852320. Its totient is φ = 653184.

The previous prime is 2491933. The next prime is 2491949. The reversal of 2491944 is 4491942.

It is not an unprimeable number, because it can be changed into a prime (2491949) 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 23 ways as a sum of consecutive naturals, for example, 15207 + ... + 15369.

It is an arithmetic number, because the mean of its divisors is an integer number (81795).

2^2491944 is an apocalyptic number.

2491944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3926160).

2491944 is an abundant number, since it is smaller than the sum of its proper divisors (5360376).

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

2491944 is a wasteful number, since it uses less digits than its factorization.

2491944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 188 counting only the distinct ones).

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

The square root of 2491944 is about 1578.5892435970. The cubic root of 2491944 is about 135.5749416370.

The spelling of 2491944 in words is "two million, four hundred ninety-one thousand, nine hundred forty-four".