6978140 has 24 divisors (see below), whose sum is σ = 15781920. Its totient is φ = 2576448.

The previous prime is 6978133. The next prime is 6978161. The reversal of 6978140 is 418796.

It is a self number, because there is not a number n which added to its sum of digits gives 6978140.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13160 + ... + 13679.

It is an arithmetic number, because the mean of its divisors is an integer number (657580).

Almost surely, 2^6978140 is an apocalyptic number.

It is an amenable number.

6978140 is an abundant number, since it is smaller than the sum of its proper divisors (8803780).

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

6978140 is a wasteful number, since it uses less digits than its factorization.

6978140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26861 (or 26859 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 6978140 is about 2641.6169290796. The cubic root of 6978140 is about 191.0937836082.

The spelling of 6978140 in words is "six million, nine hundred seventy-eight thousand, one hundred forty".