728737165 has 8 divisors (see below), whose sum is σ = 941752728. Its totient is φ = 538144320.

The previous prime is 728737111. The next prime is 728737183. The reversal of 728737165 is 561737827.

It can be written as a sum of positive squares in 4 ways, for example, as 156475081 + 572262084 = 12509^2 + 23922^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-728737165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5605606 + ... + 5605735.

It is an arithmetic number, because the mean of its divisors is an integer number (117719091).

Almost surely, 2^728737165 is an apocalyptic number.

It is an amenable number.

728737165 is a deficient number, since it is larger than the sum of its proper divisors (213015563).

728737165 is a wasteful number, since it uses less digits than its factorization.

728737165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11211359.

The product of its digits is 493920, while the sum is 46.

The square root of 728737165 is about 26995.1322463884. The cubic root of 728737165 is about 899.8918244469.

The spelling of 728737165 in words is "seven hundred twenty-eight million, seven hundred thirty-seven thousand, one hundred sixty-five".