9791920 has 20 divisors (see below), whose sum is σ = 22766400. Its totient is φ = 3916736.

The previous prime is 9791911. The next prime is 9791923. The reversal of 9791920 is 291979.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 9791920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9791923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61120 + ... + 61279.

It is an arithmetic number, because the mean of its divisors is an integer number (1138320).

Almost surely, 2^9791920 is an apocalyptic number.

It is an amenable number.

9791920 is an abundant number, since it is smaller than the sum of its proper divisors (12974480).

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

9791920 is a wasteful number, since it uses less digits than its factorization.

9791920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122412 (or 122406 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 9791920 is about 3129.2043717213. The cubic root of 9791920 is about 213.9386670248.

The spelling of 9791920 in words is "nine million, seven hundred ninety-one thousand, nine hundred twenty".