6822640 has 40 divisors (see below), whose sum is σ = 17306928. Its totient is φ = 2480640.

The previous prime is 6822631. The next prime is 6822659. The reversal of 6822640 is 462286.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 6822599 and 6822608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2997 + ... + 4756.

Almost surely, 2^6822640 is an apocalyptic number.

It is an amenable number.

6822640 is an abundant number, since it is smaller than the sum of its proper divisors (10484288).

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

6822640 is a wasteful number, since it uses less digits than its factorization.

6822640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7777 (or 7771 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 6822640 is about 2612.0183766582. The cubic root of 6822640 is about 189.6636709253.

The spelling of 6822640 in words is "six million, eight hundred twenty-two thousand, six hundred forty".