8729978732 has 12 divisors (see below), whose sum is σ = 15417623760. Its totient is φ = 4324943376.

The previous prime is 8729978717. The next prime is 8729978759. The reversal of 8729978732 is 2378799278.

It is a super-2 number, since 2×8729978732² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10011008 + ... + 10011879.

It is an arithmetic number, because the mean of its divisors is an integer number (1284801980).

Almost surely, 2^8729978732 is an apocalyptic number.

It is an amenable number.

8729978732 is a deficient number, since it is larger than the sum of its proper divisors (6687645028).

8729978732 is a wasteful number, since it uses less digits than its factorization.

8729978732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20023000 (or 20022998 counting only the distinct ones).

The product of its digits is 21337344, while the sum is 62.

The square root of 8729978732 is about 93434.3552019277. The cubic root of 8729978732 is about 2059.0697666321.

The spelling of 8729978732 in words is "eight billion, seven hundred twenty-nine million, nine hundred seventy-eight thousand, seven hundred thirty-two".