6839778 has 32 divisors (see below), whose sum is σ = 15409152. Its totient is φ = 2005200.

The previous prime is 6839771. The next prime is 6839801. The reversal of 6839778 is 8779386.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6839771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375 + ... + 3717.

It is an arithmetic number, because the mean of its divisors is an integer number (481536).

Almost surely, 2^6839778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6839778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7704576).

6839778 is an abundant number, since it is smaller than the sum of its proper divisors (8569374).

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

6839778 is a wasteful number, since it uses less digits than its factorization.

6839778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390.

The product of its digits is 508032, while the sum is 48.

The square root of 6839778 is about 2615.2969238693. The cubic root of 6839778 is about 189.8223454826.

The spelling of 6839778 in words is "six million, eight hundred thirty-nine thousand, seven hundred seventy-eight".