8728415690 has 8 divisors (see below), whose sum is σ = 15711148260. Its totient is φ = 3491366272.

The previous prime is 8728415639. The next prime is 8728415713. The reversal of 8728415690 is 965148278.

It can be written as a sum of positive squares in 2 ways, for example, as 8713662409 + 14753281 = 93347^2 + 3841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8728415690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 436420775 + ... + 436420794.

Almost surely, 2^8728415690 is an apocalyptic number.

8728415690 is a deficient number, since it is larger than the sum of its proper divisors (6982732570).

8728415690 is a wasteful number, since it uses less digits than its factorization.

8728415690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872841576.

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 8728415690 is about 93425.9904416325. The cubic root of 8728415690 is about 2058.9468719217.

The spelling of 8728415690 in words is "eight billion, seven hundred twenty-eight million, four hundred fifteen thousand, six hundred ninety".