6978540 has 48 divisors (see below), whose sum is σ = 19740672. Its totient is φ = 1841856.

The previous prime is 6978511. The next prime is 6978547. The reversal of 6978540 is 458796.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6978547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5877 + ... + 6963.

It is an arithmetic number, because the mean of its divisors is an integer number (411264).

Almost surely, 2^6978540 is an apocalyptic number.

6978540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6978540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9870336).

6978540 is an abundant number, since it is smaller than the sum of its proper divisors (12762132).

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

6978540 is a wasteful number, since it uses less digits than its factorization.

6978540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 6978540 is about 2641.6926391993. The cubic root of 6978540 is about 191.0974348225.

The spelling of 6978540 in words is "six million, nine hundred seventy-eight thousand, five hundred forty".