9881280 has 168 divisors, whose sum is σ = 35186112. Its totient is φ = 2543616.

The previous prime is 9881279. The next prime is 9881299. The reversal of 9881280 is 821889.

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135324 + ... + 135396.

Almost surely, 2^9881280 is an apocalyptic number.

9881280 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 9881280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17593056).

9881280 is an abundant number, since it is smaller than the sum of its proper divisors (25304832).

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

9881280 is a wasteful number, since it uses less digits than its factorization.

9881280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 9881280 is about 3143.4503336302. The cubic root of 9881280 is about 214.5874910014.

The spelling of 9881280 in words is "nine million, eight hundred eighty-one thousand, two hundred eighty".