139128768 has 42 divisors (see below), whose sum is σ = 398789144. Its totient is φ = 46376064.

The previous prime is 139128767. The next prime is 139128827. The reversal of 139128768 is 867821931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139128761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 120196 + ... + 121347.

Almost surely, 2^139128768 is an apocalyptic number.

139128768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

139128768 is an abundant number, since it is smaller than the sum of its proper divisors (259660376).

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

139128768 is a wasteful number, since it uses less digits than its factorization.

139128768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241561 (or 241548 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 139128768 is about 11795.2858379948. The cubic root of 139128768 is about 518.1700569143.

The spelling of 139128768 in words is "one hundred thirty-nine million, one hundred twenty-eight thousand, seven hundred sixty-eight".