9912840 has 64 divisors (see below), whose sum is σ = 33989760. Its totient is φ = 2265600.

The previous prime is 9912829. The next prime is 9912869. The reversal of 9912840 is 482199.

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, 5061 + ... + 6740.

It is an arithmetic number, because the mean of its divisors is an integer number (531090).

Almost surely, 2^9912840 is an apocalyptic number.

It is an amenable number.

9912840 is an abundant number, since it is smaller than the sum of its proper divisors (24076920).

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

9912840 is a wasteful number, since it uses less digits than its factorization.

9912840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11822 (or 11818 counting only the distinct ones).

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

The square root of 9912840 is about 3148.4662932927. The cubic root of 9912840 is about 214.8157065038.

The spelling of 9912840 in words is "nine million, nine hundred twelve thousand, eight hundred forty".