9951280 has 40 divisors (see below), whose sum is σ = 23583312. Its totient is φ = 3903744.

The previous prime is 9951257. The next prime is 9951281. The reversal of 9951280 is 821599.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (9951281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3067 + ... + 5413.

Almost surely, 2^9951280 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 9951280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11791656).

9951280 is an abundant number, since it is smaller than the sum of its proper divisors (13632032).

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

9951280 is a wasteful number, since it uses less digits than its factorization.

9951280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413 (or 2407 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 9951280 is about 3154.5649462327. The cubic root of 9951280 is about 215.0930190611.

The spelling of 9951280 in words is "nine million, nine hundred fifty-one thousand, two hundred eighty".