6720450 has 48 divisors (see below), whose sum is σ = 18186336. Its totient is φ = 1628800.

The previous prime is 6720443. The next prime is 6720473. The reversal of 6720450 is 540276.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6720450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387 + ... + 3686.

It is an arithmetic number, because the mean of its divisors is an integer number (378882).

Almost surely, 2^6720450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6720450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9093168).

6720450 is an abundant number, since it is smaller than the sum of its proper divisors (11465886).

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

6720450 is a wasteful number, since it uses less digits than its factorization.

6720450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099 (or 4094 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 6720450 is about 2592.3830735445. The cubic root of 6720450 is about 188.7119713454.

The spelling of 6720450 in words is "six million, seven hundred twenty thousand, four hundred fifty".