6219840 has 224 divisors, whose sum is σ = 23408640. Its totient is φ = 1382400.

The previous prime is 6219827. The next prime is 6219847. The reversal of 6219840 is 489126.

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 = 6219798 and 6219807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6219847) 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, 200625 + ... + 200655.

Almost surely, 2^6219840 is an apocalyptic number.

6219840 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 6219840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11704320).

6219840 is an abundant number, since it is smaller than the sum of its proper divisors (17188800).

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

6219840 is a wasteful number, since it uses less digits than its factorization.

6219840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 6219840 is about 2493.9607053841. The cubic root of 6219840 is about 183.9048026775.

The spelling of 6219840 in words is "six million, two hundred nineteen thousand, eight hundred forty".