9478640 has 40 divisors (see below), whose sum is σ = 22260480. Its totient is φ = 3753216.

The previous prime is 9478633. The next prime is 9478643. The reversal of 9478640 is 468749.

It is a happy number.

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 = 9478594 and 9478603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9478643) 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, 8177 + ... + 9263.

It is an arithmetic number, because the mean of its divisors is an integer number (556512).

Almost surely, 2^9478640 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 9478640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11130240).

9478640 is an abundant number, since it is smaller than the sum of its proper divisors (12781840).

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

9478640 is a wasteful number, since it uses less digits than its factorization.

9478640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 9478640 is about 3078.7400020138. The cubic root of 9478640 is about 211.6323281832.

The spelling of 9478640 in words is "nine million, four hundred seventy-eight thousand, six hundred forty".