6563940 has 48 divisors (see below), whose sum is σ = 18977280. Its totient is φ = 1693440.

The previous prime is 6563939. The next prime is 6563957. The reversal of 6563940 is 493656.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96 + ... + 3624.

It is an arithmetic number, because the mean of its divisors is an integer number (395360).

Almost surely, 2^6563940 is an apocalyptic number.

6563940 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 6563940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9488640).

6563940 is an abundant number, since it is smaller than the sum of its proper divisors (12413340).

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

6563940 is a wasteful number, since it uses less digits than its factorization.

6563940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572 (or 3570 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 6563940 is about 2562.0187352945. The cubic root of 6563940 is about 187.2355026171.

It can be divided in two parts, 6563 and 940, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 6563940 in words is "six million, five hundred sixty-three thousand, nine hundred forty".