30236728745 has 16 divisors (see below), whose sum is σ = 37275491088. Its totient is φ = 23528816640.

The previous prime is 30236728727. The next prime is 30236728783. The reversal of 30236728745 is 54782763203.

It can be written as a sum of positive squares in 8 ways, for example, as 912221209 + 29324507536 = 30203^2 + 171244^2 .

It is not a de Polignac number, because 30236728745 - 2⁶ = 30236728681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30236728745.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674057 + ... + 717513.

It is an arithmetic number, because the mean of its divisors is an integer number (2329718193).

Almost surely, 2^30236728745 is an apocalyptic number.

It is an amenable number.

30236728745 is a deficient number, since it is larger than the sum of its proper divisors (7038762343).

30236728745 is a wasteful number, since it uses less digits than its factorization.

30236728745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47260.

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 30236728745 in words is "thirty billion, two hundred thirty-six million, seven hundred twenty-eight thousand, seven hundred forty-five".