6720408 has 48 divisors (see below), whose sum is σ = 18880680. Its totient is φ = 2239488.

The previous prime is 6720407. The next prime is 6720409. The reversal of 6720408 is 8040276.

It is an interprime number because it is at equal distance from previous prime (6720407) and next prime (6720409).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720403) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 216 + ... + 3672.

Almost surely, 2^6720408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6720408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9440340).

6720408 is an abundant number, since it is smaller than the sum of its proper divisors (12160272).

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

6720408 is a wasteful number, since it uses less digits than its factorization.

6720408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478 (or 3462 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 6720408 is about 2592.3749728772. The cubic root of 6720408 is about 188.7115782210.

The spelling of 6720408 in words is "six million, seven hundred twenty thousand, four hundred eight".