128938 has 8 divisors (see below), whose sum is σ = 201888. Its totient is φ = 61644.

The previous prime is 128923. The next prime is 128939. The reversal of 128938 is 839821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (128939) by changing a digit.

128938 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1356 + ... + 1447.

It is an arithmetic number, because the mean of its divisors is an integer number (25236).

2¹²⁸⁹³⁸ is an apocalyptic number.

128938 is a deficient number, since it is larger than the sum of its proper divisors (72950).

128938 is a wasteful number, since it uses less digits than its factorization.

128938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828.

The product of its digits is 3456, while the sum is 31.

The square root of 128938 is about 359.0793784110. The cubic root of 128938 is about 50.5196472909.

The spelling of 128938 in words is "one hundred twenty-eight thousand, nine hundred thirty-eight".