9915750 has 128 divisors (see below), whose sum is σ = 29877120. Its totient is φ = 2419200.

The previous prime is 9915749. The next prime is 9915751. The reversal of 9915750 is 575199.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9915749) and next prime (9915751).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9915751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 87694 + ... + 87806.

It is an arithmetic number, because the mean of its divisors is an integer number (233415).

Almost surely, 2^9915750 is an apocalyptic number.

9915750 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9915750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14938560).

9915750 is an abundant number, since it is smaller than the sum of its proper divisors (19961370).

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

9915750 is a wasteful number, since it uses less digits than its factorization.

9915750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 36.

The square root of 9915750 is about 3148.9283891508. The cubic root of 9915750 is about 214.8367247841.

The spelling of 9915750 in words is "nine million, nine hundred fifteen thousand, seven hundred fifty".