6813978 has 8 divisors (see below), whose sum is σ = 13627968. Its totient is φ = 2271324.

The previous prime is 6813977. The next prime is 6814001. The reversal of 6813978 is 8793186.

It is a sphenic number, since it is the product of 3 distinct primes.

6813978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (6813973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567826 + ... + 567837.

It is an arithmetic number, because the mean of its divisors is an integer number (1703496).

Almost surely, 2^6813978 is an apocalyptic number.

6813978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6813978 is a wasteful number, since it uses less digits than its factorization.

6813978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135668.

The product of its digits is 72576, while the sum is 42.

The square root of 6813978 is about 2610.3597453225. The cubic root of 6813978 is about 189.5833714876.

The spelling of 6813978 in words is "six million, eight hundred thirteen thousand, nine hundred seventy-eight".