9857940 has 24 divisors (see below), whose sum is σ = 27602400. Its totient is φ = 2628768.

The previous prime is 9857933. The next prime is 9857957. The reversal of 9857940 is 497589.

9857940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 9857892 and 9857901.

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, 82090 + ... + 82209.

It is an arithmetic number, because the mean of its divisors is an integer number (1150100).

Almost surely, 2^9857940 is an apocalyptic number.

It is an amenable number.

9857940 is an abundant number, since it is smaller than the sum of its proper divisors (17744460).

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

9857940 is a wasteful number, since it uses less digits than its factorization.

9857940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164311 (or 164309 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 9857940 is about 3139.7356576629. The cubic root of 9857940 is about 214.4184028998.

The spelling of 9857940 in words is "nine million, eight hundred fifty-seven thousand, nine hundred forty".