8628728515 has 16 divisors (see below), whose sum is σ = 11558486016. Its totient is φ = 6129496800.

The previous prime is 8628728509. The next prime is 8628728519. The reversal of 8628728515 is 5158278268.

It is not a de Polignac number, because 8628728515 - 2²⁹ = 8091857603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8628728519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821891 + ... + 1826620.

It is an arithmetic number, because the mean of its divisors is an integer number (722405376).

Almost surely, 2^8628728515 is an apocalyptic number.

8628728515 is a deficient number, since it is larger than the sum of its proper divisors (2929757501).

8628728515 is a wasteful number, since it uses less digits than its factorization.

8628728515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648570.

The product of its digits is 2150400, while the sum is 52.

The square root of 8628728515 is about 92890.9495860603. The cubic root of 8628728515 is about 2051.0784343580.

The spelling of 8628728515 in words is "eight billion, six hundred twenty-eight million, seven hundred twenty-eight thousand, five hundred fifteen".