128938044 has 48 divisors (see below), whose sum is σ = 311220000. Its totient is φ = 41515776.

The previous prime is 128938039. The next prime is 128938049. The reversal of 128938044 is 440839821.

It is an interprime number because it is at equal distance from previous prime (128938039) and next prime (128938049).

It is a junction number, because it is equal to n+sod(n) for n = 128937993 and 128938011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128938049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65182 + ... + 67130.

It is an arithmetic number, because the mean of its divisors is an integer number (6483750).

Almost surely, 2^128938044 is an apocalyptic number.

It is an amenable number.

128938044 is an abundant number, since it is smaller than the sum of its proper divisors (182281956).

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

128938044 is a wasteful number, since it uses less digits than its factorization.

128938044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 128938044 is about 11355.0889032187. The cubic root of 128938044 is about 505.1965303751.

The spelling of 128938044 in words is "one hundred twenty-eight million, nine hundred thirty-eight thousand, forty-four".