9665280 has 108 divisors (see below), whose sum is σ = 33480720. Its totient is φ = 2574336.

The previous prime is 9665269. The next prime is 9665287. The reversal of 9665280 is 825669.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (9665287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11101 + ... + 11939.

Almost surely, 2^9665280 is an apocalyptic number.

9665280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9665280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16740360).

9665280 is an abundant number, since it is smaller than the sum of its proper divisors (23815440).

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

9665280 is a wasteful number, since it uses less digits than its factorization.

9665280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866 (or 849 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 9665280 is about 3108.9033436246. The cubic root of 9665280 is about 213.0123645537.

The spelling of 9665280 in words is "nine million, six hundred sixty-five thousand, two hundred eighty".