2681440 has 24 divisors (see below), whose sum is σ = 6335280. Its totient is φ = 1072512.

The previous prime is 2681423. The next prime is 2681443. The reversal of 2681440 is 441862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2681443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8220 + ... + 8539.

It is an arithmetic number, because the mean of its divisors is an integer number (263970).

2^2681440 is an apocalyptic number.

2681440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2681440 is an abundant number, since it is smaller than the sum of its proper divisors (3653840).

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

2681440 is a wasteful number, since it uses less digits than its factorization.

2681440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16774 (or 16766 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 2681440 is about 1637.5103053111. The cubic root of 2681440 is about 138.9278648539.

The spelling of 2681440 in words is "two million, six hundred eighty-one thousand, four hundred forty".