9981240 has 32 divisors (see below), whose sum is σ = 29944080. Its totient is φ = 2661632.

The previous prime is 9981229. The next prime is 9981271. The reversal of 9981240 is 421899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41469 + ... + 41708.

Almost surely, 2^9981240 is an apocalyptic number.

It is an amenable number.

9981240 is an abundant number, since it is smaller than the sum of its proper divisors (19962840).

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

9981240 is a wasteful number, since it uses less digits than its factorization.

9981240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83191 (or 83187 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 9981240 is about 3159.3100512612. The cubic root of 9981240 is about 215.3086606853.

The spelling of 9981240 in words is "nine million, nine hundred eighty-one thousand, two hundred forty".