6890540 has 24 divisors (see below), whose sum is σ = 15232560. Its totient is φ = 2611008.

The previous prime is 6890539. The next prime is 6890549. The reversal of 6890540 is 450986.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6890497 and 6890506.

It is not an unprimeable number, because it can be changed into a prime (6890549) 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, 8687 + ... + 9446.

It is an arithmetic number, because the mean of its divisors is an integer number (634690).

Almost surely, 2^6890540 is an apocalyptic number.

It is an amenable number.

6890540 is an abundant number, since it is smaller than the sum of its proper divisors (8342020).

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

6890540 is a wasteful number, since it uses less digits than its factorization.

6890540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18161 (or 18159 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 6890540 is about 2624.9838094739. The cubic root of 6890540 is about 190.2907828187.

The spelling of 6890540 in words is "six million, eight hundred ninety thousand, five hundred forty".