2840340 has 24 divisors (see below), whose sum is σ = 7953120. Its totient is φ = 757408.

The previous prime is 2840303. The next prime is 2840353. The reversal of 2840340 is 430482.

It is a happy number.

2840340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23610 + ... + 23729.

It is an arithmetic number, because the mean of its divisors is an integer number (331380).

2^2840340 is an apocalyptic number.

2840340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2840340 is an abundant number, since it is smaller than the sum of its proper divisors (5112780).

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

2840340 is a wasteful number, since it uses less digits than its factorization.

2840340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47351 (or 47349 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2840340 is about 1685.3308280572. The cubic root of 2840340 is about 141.6196260581.

The spelling of 2840340 in words is "two million, eight hundred forty thousand, three hundred forty".