728726065 has 8 divisors (see below), whose sum is σ = 904625640. Its totient is φ = 562877952.

The previous prime is 728726059. The next prime is 728726081. The reversal of 728726065 is 560627827.

It can be written as a sum of positive squares in 4 ways, for example, as 186814224 + 541911841 = 13668^2 + 23279^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 728726065 - 2¹⁵ = 728693297 is a prime.

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, 2512704 + ... + 2512993.

It is an arithmetic number, because the mean of its divisors is an integer number (113078205).

Almost surely, 2^728726065 is an apocalyptic number.

It is an amenable number.

728726065 is a deficient number, since it is larger than the sum of its proper divisors (175899575).

728726065 is a wasteful number, since it uses less digits than its factorization.

728726065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025731.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 728726065 is about 26994.9266529843. The cubic root of 728726065 is about 899.8872554242.

The spelling of 728726065 in words is "seven hundred twenty-eight million, seven hundred twenty-six thousand, sixty-five".