6827640 has 32 divisors (see below), whose sum is σ = 20483280. Its totient is φ = 1820672.

The previous prime is 6827633. The next prime is 6827671. The reversal of 6827640 is 467286.

6827640 = T₃₉₉ + T₄₀₀ + ... + T₄₇₀.

6827640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 28329 + ... + 28568.

Almost surely, 2^6827640 is an apocalyptic number.

6827640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6827640 is an abundant number, since it is smaller than the sum of its proper divisors (13655640).

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

6827640 is a wasteful number, since it uses less digits than its factorization.

6827640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56911 (or 56907 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 6827640 is about 2612.9753156125. The cubic root of 6827640 is about 189.7099915475.

The spelling of 6827640 in words is "six million, eight hundred twenty-seven thousand, six hundred forty".