915135728 has 40 divisors (see below), whose sum is σ = 1919148000. Its totient is φ = 420228864.

The previous prime is 915135719. The next prime is 915135737. The reversal of 915135728 is 827531519.

It is an interprime number because it is at equal distance from previous prime (915135719) and next prime (915135737).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30338 + ... + 52446.

It is an arithmetic number, because the mean of its divisors is an integer number (47978700).

Almost surely, 2^915135728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 915135728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959574000).

915135728 is an abundant number, since it is smaller than the sum of its proper divisors (1004012272).

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

915135728 is a wasteful number, since it uses less digits than its factorization.

915135728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22329 (or 22323 counting only the distinct ones).

The product of its digits is 75600, while the sum is 41.

The square root of 915135728 is about 30251.2103559510. The cubic root of 915135728 is about 970.8716888790.

The spelling of 915135728 in words is "nine hundred fifteen million, one hundred thirty-five thousand, seven hundred twenty-eight".