6855624 has 64 divisors (see below), whose sum is σ = 20174400. Its totient is φ = 2149632.

The previous prime is 6855593. The next prime is 6855631. The reversal of 6855624 is 4265586.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2739 + ... + 4605.

It is an arithmetic number, because the mean of its divisors is an integer number (315225).

Almost surely, 2^6855624 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 6855624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10087200).

6855624 is an abundant number, since it is smaller than the sum of its proper divisors (13318776).

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

6855624 is a wasteful number, since it uses less digits than its factorization.

6855624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899 (or 1889 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 6855624 is about 2618.3246551946. The cubic root of 6855624 is about 189.9688222157.

The spelling of 6855624 in words is "six million, eight hundred fifty-five thousand, six hundred twenty-four".