915616728 has 48 divisors (see below), whose sum is σ = 2670551520. Its totient is φ = 281727936.

The previous prime is 915616717. The next prime is 915616733. The reversal of 915616728 is 827616519.

915616728 is a `hidden beast` number, since 9 + 1 + 5 + 616 + 7 + 28 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 488176 + ... + 490047.

It is an arithmetic number, because the mean of its divisors is an integer number (55636490).

Almost surely, 2^915616728 is an apocalyptic number.

It is an amenable number.

915616728 is an abundant number, since it is smaller than the sum of its proper divisors (1754934792).

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

915616728 is a wasteful number, since it uses less digits than its factorization.

915616728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978248 (or 978241 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 915616728 is about 30259.1594066987. The cubic root of 915616728 is about 971.0417574545.

It can be divided in two parts, 91561 and 6728, that added together give a palindrome (98289).

The spelling of 915616728 in words is "nine hundred fifteen million, six hundred sixteen thousand, seven hundred twenty-eight".