9618440 has 64 divisors (see below), whose sum is σ = 23814000. Its totient is φ = 3474432.

The previous prime is 9618437. The next prime is 9618443. The reversal of 9618440 is 448169.

It is an interprime number because it is at equal distance from previous prime (9618437) and next prime (9618443).

It can be written as a sum of positive squares in 8 ways, for example, as 4519876 + 5098564 = 2126^2 + 2258^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9618397 and 9618406.

It is not an unprimeable number, because it can be changed into a prime (9618443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27386 + ... + 27734.

Almost surely, 2^9618440 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 9618440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11907000).

9618440 is an abundant number, since it is smaller than the sum of its proper divisors (14195560).

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

9618440 is a wasteful number, since it uses less digits than its factorization.

9618440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 9618440 is about 3101.3609915648. The cubic root of 9618440 is about 212.6677061343.

The spelling of 9618440 in words is "nine million, six hundred eighteen thousand, four hundred forty".