9634640 has 40 divisors (see below), whose sum is σ = 22686048. Its totient is φ = 3804800.

The previous prime is 9634637. The next prime is 9634649. The reversal of 9634640 is 464369.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 9634597 and 9634606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9634649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5915 + ... + 7365.

Almost surely, 2^9634640 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 9634640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11343024).

9634640 is an abundant number, since it is smaller than the sum of its proper divisors (13051408).

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

9634640 is a wasteful number, since it uses less digits than its factorization.

9634640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547 (or 1541 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 9634640 is about 3103.9716493551. The cubic root of 9634640 is about 212.7870354097.

The spelling of 9634640 in words is "nine million, six hundred thirty-four thousand, six hundred forty".