9129640 has 64 divisors (see below), whose sum is σ = 22473360. Its totient is φ = 3317760.

The previous prime is 9129619. The next prime is 9129641. The reversal of 9129640 is 469219.

It is a happy number.

9129640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 213444 + 8916196 = 462^2 + 2986^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9129641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 50350 + ... + 50530.

Almost surely, 2^9129640 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 9129640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11236680).

9129640 is an abundant number, since it is smaller than the sum of its proper divisors (13343720).

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

9129640 is a wasteful number, since it uses less digits than its factorization.

9129640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 9129640 is about 3021.5294140551. The cubic root of 9129640 is about 209.0023732398.

The spelling of 9129640 in words is "nine million, one hundred twenty-nine thousand, six hundred forty".