8728704225 has 144 divisors (see below), whose sum is σ = 16671432960. Its totient is φ = 4359398400.

The previous prime is 8728704223. The next prime is 8728704227. The reversal of 8728704225 is 5224078278.

It is an interprime number because it is at equal distance from previous prime (8728704223) and next prime (8728704227).

It is not a de Polignac number, because 8728704225 - 2¹ = 8728704223 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (8728704221) 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 143 ways as a sum of consecutive naturals, for example, 36521656 + ... + 36521894.

It is an arithmetic number, because the mean of its divisors is an integer number (115773840).

Almost surely, 2^8728704225 is an apocalyptic number.

It is an amenable number.

8728704225 is a deficient number, since it is larger than the sum of its proper divisors (7942728735).

8728704225 is a wasteful number, since it uses less digits than its factorization.

8728704225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 45.

The square root of 8728704225 is about 93427.5346190833. The cubic root of 8728704225 is about 2058.9695591887.

The spelling of 8728704225 in words is "eight billion, seven hundred twenty-eight million, seven hundred four thousand, two hundred twenty-five".