2031440 has 40 divisors (see below), whose sum is σ = 4806240. Its totient is φ = 798336.

The previous prime is 2031431. The next prime is 2031443. The reversal of 2031440 is 441302.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5171 + ... + 5549.

It is an arithmetic number, because the mean of its divisors is an integer number (120156).

2^2031440 is an apocalyptic number.

2031440 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 2031440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2403120).

2031440 is an abundant number, since it is smaller than the sum of its proper divisors (2774800).

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

2031440 is a wasteful number, since it uses less digits than its factorization.

2031440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2031440 is about 1425.2859362247. The cubic root of 2031440 is about 126.6488740782.

Adding to 2031440 its reverse (441302), we get a palindrome (2472742).

The spelling of 2031440 in words is "two million, thirty-one thousand, four hundred forty".