128446 has 4 divisors (see below), whose sum is σ = 192672. Its totient is φ = 64222.

The previous prime is 128437. The next prime is 128449. The reversal of 128446 is 644821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 644821 = 139 ⋅4639.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 128446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128449) by changing a digit.

128446 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32110 + ... + 32113.

It is an arithmetic number, because the mean of its divisors is an integer number (48168).

2¹²⁸⁴⁴⁶ is an apocalyptic number.

128446 is a deficient number, since it is larger than the sum of its proper divisors (64226).

128446 is an equidigital number, since it uses as much as digits as its factorization.

128446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64225.

The product of its digits is 1536, while the sum is 25.

The square root of 128446 is about 358.3936383364. The cubic root of 128446 is about 50.4553079746.

The spelling of 128446 in words is "one hundred twenty-eight thousand, four hundred forty-six".