9861280 has 96 divisors (see below), whose sum is σ = 27433728. Its totient is φ = 3302400.

The previous prime is 9861253. The next prime is 9861301. The reversal of 9861280 is 821689.

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, 22665 + ... + 23095.

It is an arithmetic number, because the mean of its divisors is an integer number (285768).

Almost surely, 2^9861280 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 9861280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13716864).

9861280 is an abundant number, since it is smaller than the sum of its proper divisors (17572448).

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

9861280 is a wasteful number, since it uses less digits than its factorization.

9861280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 9861280 is about 3140.2675045289. The cubic root of 9861280 is about 214.4426160924.

The spelling of 9861280 in words is "nine million, eight hundred sixty-one thousand, two hundred eighty".