6720000 has 200 divisors, whose sum is σ = 25566816. Its totient is φ = 1536000.

The previous prime is 6719989. The next prime is 6720011. The reversal of 6720000 is 276.

It is an interprime number because it is at equal distance from previous prime (6719989) and next prime (6720011).

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 959997 + ... + 960003.

Almost surely, 2^6720000 is an apocalyptic number.

6720000 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 6720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12783408).

6720000 is an abundant number, since it is smaller than the sum of its proper divisors (18846816).

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

6720000 is an frugal number, since it uses more digits than its factorization.

6720000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 6720000 is about 2592.2962793631. The cubic root of 6720000 is about 188.7077592127.

Adding to 6720000 its reverse (276), we get a palindrome (6720276).

The spelling of 6720000 in words is "six million, seven hundred twenty thousand".