2391240 has 32 divisors (see below), whose sum is σ = 7174080. Its totient is φ = 637632.

The previous prime is 2391239. The next prime is 2391269. The reversal of 2391240 is 421932.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9844 + ... + 10083.

It is an arithmetic number, because the mean of its divisors is an integer number (224190).

2^2391240 is an apocalyptic number.

2391240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2391240 is an abundant number, since it is smaller than the sum of its proper divisors (4782840).

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

2391240 is a wasteful number, since it uses less digits than its factorization.

2391240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19941 (or 19937 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 2391240 is about 1546.3634760301. The cubic root of 2391240 is about 133.7234960730.

The spelling of 2391240 in words is "two million, three hundred ninety-one thousand, two hundred forty".