128738 has 8 divisors (see below), whose sum is σ = 196560. Its totient is φ = 63220.

The previous prime is 128717. The next prime is 128747. The reversal of 128738 is 837821.

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

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 128738.

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 3 ways as a sum of consecutive naturals, for example, 428 + ... + 663.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2¹²⁸⁷³⁸ is an apocalyptic number.

128738 is a deficient number, since it is larger than the sum of its proper divisors (67822).

128738 is a wasteful number, since it uses less digits than its factorization.

128738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

The product of its digits is 2688, while the sum is 29.

The square root of 128738 is about 358.8007803782. The cubic root of 128738 is about 50.4935128745.

The spelling of 128738 in words is "one hundred twenty-eight thousand, seven hundred thirty-eight".