128738268 has 48 divisors (see below), whose sum is σ = 348284160. Its totient is φ = 41046192.

The previous prime is 128738209. The next prime is 128738287. The reversal of 128738268 is 862837821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23430 + ... + 28397.

It is an arithmetic number, because the mean of its divisors is an integer number (7255920).

Almost surely, 2^128738268 is an apocalyptic number.

128738268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128738268 is an abundant number, since it is smaller than the sum of its proper divisors (219545892).

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

128738268 is a wasteful number, since it uses less digits than its factorization.

128738268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51863 (or 51855 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 128738268 is about 11346.2887324446. The cubic root of 128738268 is about 504.9354791274.

The spelling of 128738268 in words is "one hundred twenty-eight million, seven hundred thirty-eight thousand, two hundred sixty-eight".