6856404 has 24 divisors (see below), whose sum is σ = 16040640. Its totient is φ = 2279424.

The previous prime is 6856403. The next prime is 6856411. The reversal of 6856404 is 4046586.

It is a happy number.

6856404 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×6856404² = 94020551622432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856403) 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, 8532 + ... + 9300.

It is an arithmetic number, because the mean of its divisors is an integer number (668360).

Almost surely, 2^6856404 is an apocalyptic number.

It is an amenable number.

6856404 is an abundant number, since it is smaller than the sum of its proper divisors (9184236).

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

6856404 is a wasteful number, since it uses less digits than its factorization.

6856404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 6856404 is about 2618.4736011654. The cubic root of 6856404 is about 189.9760265228.

It can be divided in two parts, 6856 and 404, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 6856404 in words is "six million, eight hundred fifty-six thousand, four hundred four".