6978864 has 40 divisors (see below), whose sum is σ = 18123840. Its totient is φ = 2314048.

The previous prime is 6978841. The next prime is 6978869. The reversal of 6978864 is 4688796.

6978864 is nontrivially palindromic in base 15.

6978864 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a d-powerful number, because it can be written as 6³ + 9⁷ + 7 + 8⁵ + 8⁷ + 6³ + 4⁸ .

It is not an unprimeable number, because it can be changed into a prime (6978869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16447 + ... + 16865.

It is an arithmetic number, because the mean of its divisors is an integer number (453096).

Almost surely, 2^6978864 is an apocalyptic number.

It is an amenable number.

6978864 is an abundant number, since it is smaller than the sum of its proper divisors (11144976).

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

6978864 is a wasteful number, since it uses less digits than its factorization.

6978864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 771 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 6978864 is about 2641.7539628058. The cubic root of 6978864 is about 191.1003922037.

The spelling of 6978864 in words is "six million, nine hundred seventy-eight thousand, eight hundred sixty-four".