6786378 has 12 divisors (see below), whose sum is σ = 14703858. Its totient is φ = 2262120.

The previous prime is 6786371. The next prime is 6786391. The reversal of 6786378 is 8736876.

6786378 is a `hidden beast` number, since 6 + 7 + 8 + 637 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3448449 + 3337929 = 1857^2 + 1827^2 .

It is not an unprimeable number, because it can be changed into a prime (6786371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188493 + ... + 188528.

Almost surely, 2^6786378 is an apocalyptic number.

6786378 is an abundant number, since it is smaller than the sum of its proper divisors (7917480).

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

6786378 is a wasteful number, since it uses less digits than its factorization.

6786378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377029 (or 377026 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 6786378 is about 2605.0677534375. The cubic root of 6786378 is about 189.3270561244.

It can be divided in two parts, 678 and 6378, that added together give a square (7056 = 84²).

The spelling of 6786378 in words is "six million, seven hundred eighty-six thousand, three hundred seventy-eight".