9688139958 has 128 divisors (see below), whose sum is σ = 23315328000. Its totient is φ = 2681392896.

The previous prime is 9688139947. The next prime is 9688139963. The reversal of 9688139958 is 8599318869.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8863260 + ... + 8864352.

It is an arithmetic number, because the mean of its divisors is an integer number (182151000).

Almost surely, 2^9688139958 is an apocalyptic number.

9688139958 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9688139958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11657664000).

9688139958 is an abundant number, since it is smaller than the sum of its proper divisors (13627188042).

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

9688139958 is a wasteful number, since it uses less digits than its factorization.

9688139958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251 (or 1237 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 66.

The square root of 9688139958 is about 98428.3493613502. The cubic root of 9688139958 is about 2131.8016861547.

The spelling of 9688139958 in words is "nine billion, six hundred eighty-eight million, one hundred thirty-nine thousand, nine hundred fifty-eight".