6720144 has 40 divisors (see below), whose sum is σ = 17475072. Its totient is φ = 2225280.

The previous prime is 6720143. The next prime is 6720157. The reversal of 6720144 is 4410276.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (6720143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8802 + ... + 9534.

Almost surely, 2^6720144 is an apocalyptic number.

It is an amenable number.

6720144 is an abundant number, since it is smaller than the sum of its proper divisors (10754928).

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

6720144 is a wasteful number, since it uses less digits than its factorization.

6720144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 6720144 is about 2592.3240538173. The cubic root of 6720144 is about 188.7091071156.

The spelling of 6720144 in words is "six million, seven hundred twenty thousand, one hundred forty-four".