9428121885 has 256 divisors, whose sum is σ = 20592230400. Its totient is φ = 3571236864.

The previous prime is 9428121883. The next prime is 9428121949. The reversal of 9428121885 is 5881218249.

It is not a de Polignac number, because 9428121885 - 2¹ = 9428121883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9428121881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 67828146 + ... + 67828284.

It is an arithmetic number, because the mean of its divisors is an integer number (80438400).

Almost surely, 2^9428121885 is an apocalyptic number.

It is an amenable number.

9428121885 is an abundant number, since it is smaller than the sum of its proper divisors (11164108515).

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

9428121885 is a wasteful number, since it uses less digits than its factorization.

9428121885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300.

The product of its digits is 368640, while the sum is 48.

The square root of 9428121885 is about 97098.5163892837. The cubic root of 9428121885 is about 2112.5568074543.

The spelling of 9428121885 in words is "nine billion, four hundred twenty-eight million, one hundred twenty-one thousand, eight hundred eighty-five".