6922640 has 20 divisors (see below), whose sum is σ = 16095324. Its totient is φ = 2769024.

The previous prime is 6922639. The next prime is 6922649. The reversal of 6922640 is 462296.

It can be written as a sum of positive squares in 2 ways, for example, as 1008016 + 5914624 = 1004^2 + 2432^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (6922649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43187 + ... + 43346.

Almost surely, 2^6922640 is an apocalyptic number.

It is an amenable number.

6922640 is an abundant number, since it is smaller than the sum of its proper divisors (9172684).

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

6922640 is a wasteful number, since it uses less digits than its factorization.

6922640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86546 (or 86540 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6922640 is about 2631.0910284519. The cubic root of 6922640 is about 190.5858188755.

The spelling of 6922640 in words is "six million, nine hundred twenty-two thousand, six hundred forty".