6778044 has 72 divisors (see below), whose sum is σ = 21097440. Its totient is φ = 1786752.

The previous prime is 6778043. The next prime is 6778049. The reversal of 6778044 is 4408776.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2242 + ... + 4310.

It is an arithmetic number, because the mean of its divisors is an integer number (293020).

Almost surely, 2^6778044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6778044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10548720).

6778044 is an abundant number, since it is smaller than the sum of its proper divisors (14319396).

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

6778044 is a wasteful number, since it uses less digits than its factorization.

6778044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099 (or 2094 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 6778044 is about 2603.4676875275. The cubic root of 6778044 is about 189.2495234543.

The spelling of 6778044 in words is "six million, seven hundred seventy-eight thousand, forty-four".