6244640 has 48 divisors (see below), whose sum is σ = 15240960. Its totient is φ = 2415360.

The previous prime is 6244621. The next prime is 6244643. The reversal of 6244640 is 464426.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6244643) 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, 4331 + ... + 5589.

It is an arithmetic number, because the mean of its divisors is an integer number (317520).

Almost surely, 2^6244640 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 6244640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7620480).

6244640 is an abundant number, since it is smaller than the sum of its proper divisors (8996320).

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

6244640 is a wasteful number, since it uses less digits than its factorization.

6244640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 6244640 is about 2498.9277700646. The cubic root of 6244640 is about 184.1489027817.

The spelling of 6244640 in words is "six million, two hundred forty-four thousand, six hundred forty".