6490840 has 32 divisors (see below), whose sum is σ = 14683680. Its totient is φ = 2582272.

The previous prime is 6490831. The next prime is 6490871. The reversal of 6490840 is 480946.

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, 10212 + ... + 10828.

It is an arithmetic number, because the mean of its divisors is an integer number (458865).

Almost surely, 2^6490840 is an apocalyptic number.

It is an amenable number.

6490840 is an abundant number, since it is smaller than the sum of its proper divisors (8192840).

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

6490840 is a wasteful number, since it uses less digits than its factorization.

6490840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 6490840 is about 2547.7126996583. The cubic root of 6490840 is about 186.5378504685.

The spelling of 6490840 in words is "six million, four hundred ninety thousand, eight hundred forty".