6314640 has 80 divisors (see below), whose sum is σ = 19873728. Its totient is φ = 1658368.

The previous prime is 6314617. The next prime is 6314641. The reversal of 6314640 is 464136.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6314640.

It is not an unprimeable number, because it can be changed into a prime (6314641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19762 + ... + 20078.

Almost surely, 2^6314640 is an apocalyptic number.

6314640 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 6314640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9936864).

6314640 is an abundant number, since it is smaller than the sum of its proper divisors (13559088).

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

6314640 is a wasteful number, since it uses less digits than its factorization.

6314640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 6314640 is about 2512.8947451097. The cubic root of 6314640 is about 184.8344269738.

Adding to 6314640 its reverse (464136), we get a palindrome (6778776).

The spelling of 6314640 in words is "six million, three hundred fourteen thousand, six hundred forty".