6408740 has 36 divisors (see below), whose sum is σ = 14586516. Its totient is φ = 2351232.

The previous prime is 6408713. The next prime is 6408749. The reversal of 6408740 is 478046.

It can be written as a sum of positive squares in 6 ways, for example, as 1364224 + 5044516 = 1168^2 + 2246^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6408749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40742 + ... + 40898.

It is an arithmetic number, because the mean of its divisors is an integer number (405181).

Almost surely, 2^6408740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6408740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7293258).

6408740 is an abundant number, since it is smaller than the sum of its proper divisors (8177776).

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

6408740 is a wasteful number, since it uses less digits than its factorization.

6408740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 6408740 is about 2531.5489329657. The cubic root of 6408740 is about 185.7480304981.

The spelling of 6408740 in words is "six million, four hundred eight thousand, seven hundred forty".