8728740445 has 8 divisors (see below), whose sum is σ = 10479184344. Its totient is φ = 6979861824.

The previous prime is 8728740443. The next prime is 8728740481. The reversal of 8728740445 is 5440478278.

It can be written as a sum of positive squares in 4 ways, for example, as 444282084 + 8284458361 = 21078^2 + 91019^2 .

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 8728740445 - 2¹ = 8728740443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8728740443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379014 + ... + 401383.

It is an arithmetic number, because the mean of its divisors is an integer number (1309898043).

Almost surely, 2^8728740445 is an apocalyptic number.

It is an amenable number.

8728740445 is a deficient number, since it is larger than the sum of its proper divisors (1750443899).

8728740445 is a wasteful number, since it uses less digits than its factorization.

8728740445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782639.

The product of its (nonzero) digits is 2007040, while the sum is 49.

The square root of 8728740445 is about 93427.7284589538. The cubic root of 8728740445 is about 2058.9724071018.

The spelling of 8728740445 in words is "eight billion, seven hundred twenty-eight million, seven hundred forty thousand, four hundred forty-five".