9965280 has 96 divisors (see below), whose sum is σ = 33826464. Its totient is φ = 2451456.

The previous prime is 9965273. The next prime is 9965311. The reversal of 9965280 is 825699.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5442 + ... + 7038.

It is an arithmetic number, because the mean of its divisors is an integer number (352359).

Almost surely, 2^9965280 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 9965280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16913232).

9965280 is an abundant number, since it is smaller than the sum of its proper divisors (23861184).

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

9965280 is a wasteful number, since it uses less digits than its factorization.

9965280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628 (or 1620 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 9965280 is about 3156.7831727884. The cubic root of 9965280 is about 215.1938399678.

The spelling of 9965280 in words is "nine million, nine hundred sixty-five thousand, two hundred eighty".