361728145 has 4 divisors (see below), whose sum is σ = 434073780. Its totient is φ = 289382512.

The previous prime is 361728139. The next prime is 361728149. The reversal of 361728145 is 541827163.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67125249 + 294602896 = 8193^2 + 17164^2 .

It is a cyclic number.

It is not a de Polignac number, because 361728145 - 2⁵ = 361728113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (361728149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36172810 + ... + 36172819.

It is an arithmetic number, because the mean of its divisors is an integer number (108518445).

Almost surely, 2^361728145 is an apocalyptic number.

It is an amenable number.

361728145 is a deficient number, since it is larger than the sum of its proper divisors (72345635).

361728145 is an equidigital number, since it uses as much as digits as its factorization.

361728145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72345634.

The product of its digits is 40320, while the sum is 37.

The square root of 361728145 is about 19019.1520578600. The cubic root of 361728145 is about 712.5151456717.

The spelling of 361728145 in words is "three hundred sixty-one million, seven hundred twenty-eight thousand, one hundred forty-five".