6840078 has 16 divisors (see below), whose sum is σ = 15634560. Its totient is φ = 1954296.

The previous prime is 6840073. The next prime is 6840083. The reversal of 6840078 is 8700486.

6840078 is digitally balanced in base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6840073) and next prime (6840083).

6840078 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840073) 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, 81388 + ... + 81471.

It is an arithmetic number, because the mean of its divisors is an integer number (977160).

Almost surely, 2^6840078 is an apocalyptic number.

6840078 is an abundant number, since it is smaller than the sum of its proper divisors (8794482).

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

6840078 is a wasteful number, since it uses less digits than its factorization.

6840078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162871.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 6840078 is about 2615.3542781046. The cubic root of 6840078 is about 189.8251207126.

The spelling of 6840078 in words is "six million, eight hundred forty thousand, seventy-eight".