9881908428 has 24 divisors (see below), whose sum is σ = 26351756032. Its totient is φ = 2823402384.

The previous prime is 9881908397. The next prime is 9881908447. The reversal of 9881908428 is 8248091889.

It is a super-2 number, since 2×9881908428² (a number of 21 digits) contains 22 as substring.

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, 58820800 + ... + 58820967.

Almost surely, 2^9881908428 is an apocalyptic number.

It is an amenable number.

9881908428 is an abundant number, since it is smaller than the sum of its proper divisors (16469847604).

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

9881908428 is a wasteful number, since it uses less digits than its factorization.

9881908428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117641781 (or 117641779 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 57.

The square root of 9881908428 is about 99407.7885680996. The cubic root of 9881908428 is about 2145.9204000484.

The spelling of 9881908428 in words is "nine billion, eight hundred eighty-one million, nine hundred eight thousand, four hundred twenty-eight".