128578 has 8 divisors (see below), whose sum is σ = 196668. Its totient is φ = 63024.

The previous prime is 128563. The next prime is 128591. The reversal of 128578 is 875821.

It can be written as a sum of positive squares in 2 ways, for example, as 124609 + 3969 = 353^2 + 63^2 .

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

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501 + ... + 712.

2¹²⁸⁵⁷⁸ is an apocalyptic number.

128578 is a deficient number, since it is larger than the sum of its proper divisors (68090).

128578 is a wasteful number, since it uses less digits than its factorization.

128578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268.

The product of its digits is 4480, while the sum is 31.

The square root of 128578 is about 358.5777461026. The cubic root of 128578 is about 50.4725858462.

It can be divided in two parts, 128 and 578, that multiplied together give a square (73984 = 272²).

The spelling of 128578 in words is "one hundred twenty-eight thousand, five hundred seventy-eight".