2942840 has 16 divisors (see below), whose sum is σ = 6621480. Its totient is φ = 1177120.

The previous prime is 2942809. The next prime is 2942843. The reversal of 2942840 is 482492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2942843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36746 + ... + 36825.

2^2942840 is an apocalyptic number.

2942840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2942840 is an abundant number, since it is smaller than the sum of its proper divisors (3678640).

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

2942840 is a wasteful number, since it uses less digits than its factorization.

2942840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73582 (or 73578 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 2942840 is about 1715.4707808645. The cubic root of 2942840 is about 143.3030883844.

The spelling of 2942840 in words is "two million, nine hundred forty-two thousand, eight hundred forty".