9491640 has 128 divisors (see below), whose sum is σ = 31449600. Its totient is φ = 2280960.

The previous prime is 9491633. The next prime is 9491681. The reversal of 9491640 is 461949.

9491640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52350 + ... + 52530.

It is an arithmetic number, because the mean of its divisors is an integer number (245700).

Almost surely, 2^9491640 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 9491640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15724800).

9491640 is an abundant number, since it is smaller than the sum of its proper divisors (21957960).

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

9491640 is a wasteful number, since it uses less digits than its factorization.

9491640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 9491640 is about 3080.8505319148. The cubic root of 9491640 is about 211.7290355678.

The spelling of 9491640 in words is "nine million, four hundred ninety-one thousand, six hundred forty".