9861240 has 64 divisors (see below), whose sum is σ = 30396960. Its totient is φ = 2557440.

The previous prime is 9861239. The next prime is 9861253. The reversal of 9861240 is 421689.

9861240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 9861198 and 9861207.

It is a congruent number.

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, 3330 + ... + 5550.

Almost surely, 2^9861240 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 9861240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15198480).

9861240 is an abundant number, since it is smaller than the sum of its proper divisors (20535720).

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

9861240 is a wasteful number, since it uses less digits than its factorization.

9861240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272 (or 2268 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 9861240 is about 3140.2611356382. The cubic root of 9861240 is about 214.4423261464.

It can be divided in two parts, 9861 and 240, that added together give a palindrome (10101).

The spelling of 9861240 in words is "nine million, eight hundred sixty-one thousand, two hundred forty".