128139348 has 48 divisors (see below), whose sum is σ = 314979840. Its totient is φ = 40464864.

The previous prime is 128139331. The next prime is 128139373. The reversal of 128139348 is 843931821.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27363 + ... + 31701.

It is an arithmetic number, because the mean of its divisors is an integer number (6562080).

Almost surely, 2^128139348 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128139348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157489920).

128139348 is an abundant number, since it is smaller than the sum of its proper divisors (186840492).

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

128139348 is a wasteful number, since it uses less digits than its factorization.

128139348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476 (or 4474 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 128139348 is about 11319.8651935436. The cubic root of 128139348 is about 504.1512364226.

The spelling of 128139348 in words is "one hundred twenty-eight million, one hundred thirty-nine thousand, three hundred forty-eight".