2991240 has 96 divisors (see below), whose sum is σ = 11119680. Its totient is φ = 683136.

The previous prime is 2991239. The next prime is 2991253. The reversal of 2991240 is 421992.

2991240 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1927 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (115830).

2^2991240 is an apocalyptic number.

2991240 is a gapful number since it is divisible by the number (20) 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 2991240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5559840).

2991240 is an abundant number, since it is smaller than the sum of its proper divisors (8128440).

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

2991240 is a wasteful number, since it uses less digits than its factorization.

2991240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2991240 is about 1729.5201646700. The cubic root of 2991240 is about 144.0844412150.

The spelling of 2991240 in words is "two million, nine hundred ninety-one thousand, two hundred forty".