6818904 has 80 divisors (see below), whose sum is σ = 20255400. Its totient is φ = 2135808.

The previous prime is 6818899. The next prime is 6818939. The reversal of 6818904 is 4098186.

It is a happy number.

It is a super-2 number, since 2×6818904² = 92994903522432, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10707 + ... + 11325.

Almost surely, 2^6818904 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 6818904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10127700).

6818904 is an abundant number, since it is smaller than the sum of its proper divisors (13436496).

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

6818904 is a wasteful number, since it uses less digits than its factorization.

6818904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 6818904 is about 2611.3031229637. The cubic root of 6818904 is about 189.6290453820.

The spelling of 6818904 in words is "six million, eight hundred eighteen thousand, nine hundred four".