8721232730 has 64 divisors (see below), whose sum is σ = 19024450560. Its totient is φ = 2810056704.

The previous prime is 8721232711. The next prime is 8721232757. The reversal of 8721232730 is 372321278.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 850514 + ... + 860706.

It is an arithmetic number, because the mean of its divisors is an integer number (297257040).

Almost surely, 2^8721232730 is an apocalyptic number.

8721232730 is an abundant number, since it is smaller than the sum of its proper divisors (10303217830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8721232730 is a wasteful number, since it uses less digits than its factorization.

8721232730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10943.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 8721232730 is about 93387.5405501184. The cubic root of 8721232730 is about 2058.3819205295.

The spelling of 8721232730 in words is "eight billion, seven hundred twenty-one million, two hundred thirty-two thousand, seven hundred thirty".