9647440 has 80 divisors (see below), whose sum is σ = 25801920. Its totient is φ = 3317760.

The previous prime is 9647413. The next prime is 9647447. The reversal of 9647440 is 447469.

It is a tau number, because it is divible by the number of its divisors (80).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9647396 and 9647405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9647447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16432 + ... + 17008.

It is an arithmetic number, because the mean of its divisors is an integer number (322524).

Almost surely, 2^9647440 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 9647440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12900960).

9647440 is an abundant number, since it is smaller than the sum of its proper divisors (16154480).

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

9647440 is a wasteful number, since it uses less digits than its factorization.

9647440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 9647440 is about 3106.0328394916. The cubic root of 9647440 is about 212.8812257054.

The spelling of 9647440 in words is "nine million, six hundred forty-seven thousand, four hundred forty".