6321840 has 160 divisors (see below), whose sum is σ = 23141376. Its totient is φ = 1397760.

The previous prime is 6321823. The next prime is 6321853. The reversal of 6321840 is 481236.

It is a happy number.

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 6321840.

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, 89005 + ... + 89075.

Almost surely, 2^6321840 is an apocalyptic number.

6321840 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 6321840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11570688).

6321840 is an abundant number, since it is smaller than the sum of its proper divisors (16819536).

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

6321840 is a wasteful number, since it uses less digits than its factorization.

6321840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 6321840 is about 2514.3269477138. The cubic root of 6321840 is about 184.9046501586.

The spelling of 6321840 in words is "six million, three hundred twenty-one thousand, eight hundred forty".