9420128920 has 16 divisors (see below), whose sum is σ = 21195290160. Its totient is φ = 3768051552.

The previous prime is 9420128873. The next prime is 9420128941. The reversal of 9420128920 is 298210249.

It is a super-4 number, since 4×9420128920⁴ (a number of 41 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9420128920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117751572 + ... + 117751651.

It is an arithmetic number, because the mean of its divisors is an integer number (1324705635).

Almost surely, 2^9420128920 is an apocalyptic number.

It is an amenable number.

9420128920 is an abundant number, since it is smaller than the sum of its proper divisors (11775161240).

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

9420128920 is a wasteful number, since it uses less digits than its factorization.

9420128920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235503234 (or 235503230 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 9420128920 is about 97057.3486141055. The cubic root of 9420128920 is about 2111.9596448088.

The spelling of 9420128920 in words is "nine billion, four hundred twenty million, one hundred twenty-eight thousand, nine hundred twenty".