6815622 has 32 divisors (see below), whose sum is σ = 15277824. Its totient is φ = 2008800.

The previous prime is 6815603. The next prime is 6815639. The reversal of 6815622 is 2265186.

It is a self number, because there is not a number n which added to its sum of digits gives 6815622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1047 + ... + 3837.

It is an arithmetic number, because the mean of its divisors is an integer number (477432).

Almost surely, 2^6815622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6815622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7638912).

6815622 is an abundant number, since it is smaller than the sum of its proper divisors (8462202).

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

6815622 is a wasteful number, since it uses less digits than its factorization.

6815622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844.

The product of its digits is 5760, while the sum is 30.

The square root of 6815622 is about 2610.6746254560. The cubic root of 6815622 is about 189.5986171097.

The spelling of 6815622 in words is "six million, eight hundred fifteen thousand, six hundred twenty-two".