6328729 has 16 divisors (see below), whose sum is σ = 7361280. Its totient is φ = 5380560.

The previous prime is 6328723. The next prime is 6328733. The reversal of 6328729 is 9278236.

It is a cyclic number.

It is not a de Polignac number, because 6328729 - 2⁷ = 6328601 is a prime.

It is a super-4 number, since 4×6328729⁴ (a number of 28 digits) contains 4444 as substring.

It is a d-powerful number, because it can be written as 6² + 3⁵ + 2⁵ + 8⁵ + 7⁸ + 2¹⁹ + 9⁴ .

It is a Duffinian number.

6328729 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6328723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22222 + ... + 22504.

It is an arithmetic number, because the mean of its divisors is an integer number (460080).

Almost surely, 2^6328729 is an apocalyptic number.

It is an amenable number.

6328729 is a deficient number, since it is larger than the sum of its proper divisors (1032551).

6328729 is a wasteful number, since it uses less digits than its factorization.

6328729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its digits is 36288, while the sum is 37.

The square root of 6328729 is about 2515.6965238279. The cubic root of 6328729 is about 184.9717901958.

The spelling of 6328729 in words is "six million, three hundred twenty-eight thousand, seven hundred twenty-nine".