9881240 has 16 divisors (see below), whose sum is σ = 22232880. Its totient is φ = 3952480.

The previous prime is 9881239. The next prime is 9881269. The reversal of 9881240 is 421889.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 9881197 and 9881206.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 123476 + ... + 123555.

It is an arithmetic number, because the mean of its divisors is an integer number (1389555).

Almost surely, 2^9881240 is an apocalyptic number.

It is an amenable number.

9881240 is an abundant number, since it is smaller than the sum of its proper divisors (12351640).

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

9881240 is a wasteful number, since it uses less digits than its factorization.

9881240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247042 (or 247038 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 9881240 is about 3143.4439711883. The cubic root of 9881240 is about 214.5872014468.

The spelling of 9881240 in words is "nine million, eight hundred eighty-one thousand, two hundred forty".