6729408 has 84 divisors (see below), whose sum is σ = 22057360. Its totient is φ = 1921536.

The previous prime is 6729389. The next prime is 6729419. The reversal of 6729408 is 8049276.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 3198 + ... + 4866.

Almost surely, 2^6729408 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 6729408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11028680).

6729408 is an abundant number, since it is smaller than the sum of its proper divisors (15327952).

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

6729408 is a wasteful number, since it uses less digits than its factorization.

6729408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694 (or 1681 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 6729408 is about 2594.1102520903. The cubic root of 6729408 is about 188.7957817692.

The spelling of 6729408 in words is "six million, seven hundred twenty-nine thousand, four hundred eight".