6533940 has 96 divisors (see below), whose sum is σ = 21417984. Its totient is φ = 1457280.

The previous prime is 6533939. The next prime is 6533951. The reversal of 6533940 is 493356.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6533898 and 6533907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19575 + ... + 19905.

It is an arithmetic number, because the mean of its divisors is an integer number (223104).

Almost surely, 2^6533940 is an apocalyptic number.

6533940 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 6533940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10708992).

6533940 is an abundant number, since it is smaller than the sum of its proper divisors (14884044).

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

6533940 is a wasteful number, since it uses less digits than its factorization.

6533940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 6533940 is about 2556.1572721568. The cubic root of 6533940 is about 186.9498182906.

The spelling of 6533940 in words is "six million, five hundred thirty-three thousand, nine hundred forty".