6305640 has 128 divisors (see below), whose sum is σ = 21928320. Its totient is φ = 1433600.

The previous prime is 6305627. The next prime is 6305647. The reversal of 6305640 is 465036.

It is a super-2 number, since 2×6305640² = 79522191619200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 6305640.

It is not an unprimeable number, because it can be changed into a prime (6305647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22300 + ... + 22580.

It is an arithmetic number, because the mean of its divisors is an integer number (171315).

Almost surely, 2^6305640 is an apocalyptic number.

6305640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6305640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10964160).

6305640 is an abundant number, since it is smaller than the sum of its proper divisors (15622680).

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

6305640 is a wasteful number, since it uses less digits than its factorization.

6305640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 6305640 is about 2511.1033431542. The cubic root of 6305640 is about 184.7465728876.

The spelling of 6305640 in words is "six million, three hundred five thousand, six hundred forty".