9551640 has 128 divisors (see below), whose sum is σ = 33384960. Its totient is φ = 2141184.

The previous prime is 9551639. The next prime is 9551677. The reversal of 9551640 is 461559.

9551640 is digitally balanced in base 2, base 4 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×9551640⁴ (a number of 29 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 9551598 and 9551607.

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, 69652 + ... + 69788.

It is an arithmetic number, because the mean of its divisors is an integer number (260820).

Almost surely, 2^9551640 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 9551640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16692480).

9551640 is an abundant number, since it is smaller than the sum of its proper divisors (23833320).

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

9551640 is a wasteful number, since it uses less digits than its factorization.

9551640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 9551640 is about 3090.5727624504. The cubic root of 9551640 is about 212.1742367297.

The spelling of 9551640 in words is "nine million, five hundred fifty-one thousand, six hundred forty".