727990145 has 8 divisors (see below), whose sum is σ = 878415720. Its totient is φ = 579173760.

The previous prime is 727990079. The next prime is 727990147. The reversal of 727990145 is 541099727.

727990145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 46362481 + 681627664 = 6809^2 + 26108^2 .

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

It is not a de Polignac number, because 727990145 - 2²⁰ = 726941569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 727990096 and 727990105.

It is not an unprimeable number, because it can be changed into a prime (727990147) 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, 401300 + ... + 403109.

It is an arithmetic number, because the mean of its divisors is an integer number (109801965).

Almost surely, 2^727990145 is an apocalyptic number.

It is an amenable number.

727990145 is a deficient number, since it is larger than the sum of its proper divisors (150425575).

727990145 is a wasteful number, since it uses less digits than its factorization.

727990145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804595.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 727990145 is about 26981.2925005456. The cubic root of 727990145 is about 899.5842297682.

The spelling of 727990145 in words is "seven hundred twenty-seven million, nine hundred ninety thousand, one hundred forty-five".