6720436 has 12 divisors (see below), whose sum is σ = 12011328. Its totient is φ = 3288632.

The previous prime is 6720409. The next prime is 6720437. The reversal of 6720436 is 6340276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17686 + ... + 18061.

It is an arithmetic number, because the mean of its divisors is an integer number (1000944).

Almost surely, 2^6720436 is an apocalyptic number.

It is an amenable number.

6720436 is a deficient number, since it is larger than the sum of its proper divisors (5290892).

6720436 is a wasteful number, since it uses less digits than its factorization.

6720436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35798 (or 35796 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 6720436 is about 2592.3803733249. The cubic root of 6720436 is about 188.7118403041.

It can be divided in two parts, 67 and 20436, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 6720436 in words is "six million, seven hundred twenty thousand, four hundred thirty-six".