6978788 has 6 divisors (see below), whose sum is σ = 12212886. Its totient is φ = 3489392.

The previous prime is 6978779. The next prime is 6978793. The reversal of 6978788 is 8878796.

It can be written as a sum of positive squares in only one way, i.e., 6041764 + 937024 = 2458^2 + 968^2 .

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 as a sum of consecutive naturals, namely, 872345 + ... + 872352.

It is an arithmetic number, because the mean of its divisors is an integer number (2035481).

Almost surely, 2^6978788 is an apocalyptic number.

It is an amenable number.

6978788 is a deficient number, since it is larger than the sum of its proper divisors (5234098).

6978788 is a wasteful number, since it uses less digits than its factorization.

6978788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744701 (or 1744699 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 53.

The square root of 6978788 is about 2641.7395783839. The cubic root of 6978788 is about 191.0996985052.

The spelling of 6978788 in words is "six million, nine hundred seventy-eight thousand, seven hundred eighty-eight".