2978340 has 24 divisors (see below), whose sum is σ = 8339520. Its totient is φ = 794208.

The previous prime is 2978323. The next prime is 2978357. The reversal of 2978340 is 438792.

It is an interprime number because it is at equal distance from previous prime (2978323) and next prime (2978357).

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, 24760 + ... + 24879.

It is an arithmetic number, because the mean of its divisors is an integer number (347480).

2^2978340 is an apocalyptic number.

2978340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2978340 is an abundant number, since it is smaller than the sum of its proper divisors (5361180).

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

2978340 is a wasteful number, since it uses less digits than its factorization.

2978340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49651 (or 49649 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 2978340 is about 1725.7867770962. The cubic root of 2978340 is about 143.8770169099.

The spelling of 2978340 in words is "two million, nine hundred seventy-eight thousand, three hundred forty".