180728523 has 8 divisors (see below), whose sum is σ = 267746000. Its totient is φ = 120485664.

The previous prime is 180728521. The next prime is 180728539. The reversal of 180728523 is 325827081.

It is not a de Polignac number, because 180728523 - 2¹ = 180728521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180728521) 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, 3346798 + ... + 3346851.

It is an arithmetic number, because the mean of its divisors is an integer number (33468250).

Almost surely, 2^180728523 is an apocalyptic number.

180728523 is a deficient number, since it is larger than the sum of its proper divisors (87017477).

180728523 is an equidigital number, since it uses as much as digits as its factorization.

180728523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6693658 (or 6693652 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 180728523 is about 13443.5308977962. The cubic root of 180728523 is about 565.3823323907.

The spelling of 180728523 in words is "one hundred eighty million, seven hundred twenty-eight thousand, five hundred twenty-three".