6840520 has 32 divisors (see below), whose sum is σ = 15924600. Its totient is φ = 2641408.

The previous prime is 6840497. The next prime is 6840527. The reversal of 6840520 is 250486.

It can be written as a sum of positive squares in 4 ways, for example, as 6563844 + 276676 = 2562^2 + 526^2 .

It is not an unprimeable number, because it can be changed into a prime (6840527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1789 + ... + 4108.

Almost surely, 2^6840520 is an apocalyptic number.

It is an amenable number.

6840520 is an abundant number, since it is smaller than the sum of its proper divisors (9084080).

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

6840520 is a wasteful number, since it uses less digits than its factorization.

6840520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5937 (or 5933 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 6840520 is about 2615.4387777197. The cubic root of 6840520 is about 189.8292094036.

The spelling of 6840520 in words is "six million, eight hundred forty thousand, five hundred twenty".