728409117 has 8 divisors (see below), whose sum is σ = 972124960. Its totient is φ = 485149680.

The previous prime is 728409107. The next prime is 728409127. The reversal of 728409117 is 711904827.

728409117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (728409107) and next prime (728409127).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 728409117 - 2¹⁵ = 728376349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728409107) 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, 110359 + ... + 116772.

It is an arithmetic number, because the mean of its divisors is an integer number (121515620).

Almost surely, 2^728409117 is an apocalyptic number.

It is an amenable number.

728409117 is a deficient number, since it is larger than the sum of its proper divisors (243715843).

728409117 is a wasteful number, since it uses less digits than its factorization.

728409117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228203.

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 728409117 is about 26989.0555040372. The cubic root of 728409117 is about 899.7567725446.

The spelling of 728409117 in words is "seven hundred twenty-eight million, four hundred nine thousand, one hundred seventeen".