9725870 has 64 divisors (see below), whose sum is σ = 23141376. Its totient is φ = 2849280.

The previous prime is 9725839. The next prime is 9725873. The reversal of 9725870 is 785279.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9725873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12719 + ... + 13461.

It is an arithmetic number, because the mean of its divisors is an integer number (361584).

Almost surely, 2^9725870 is an apocalyptic number.

9725870 is an abundant number, since it is smaller than the sum of its proper divisors (13415506).

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

9725870 is a wasteful number, since it uses less digits than its factorization.

9725870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 9725870 is about 3118.6327132255. The cubic root of 9725870 is about 213.4565504548.

The spelling of 9725870 in words is "nine million, seven hundred twenty-five thousand, eight hundred seventy".