128338445 has 32 divisors (see below), whose sum is σ = 168220800. Its totient is φ = 93671424.

The previous prime is 128338421. The next prime is 128338471. The reversal of 128338445 is 544833821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 128338445 - 2⁶ = 128338381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128338399 and 128338408.

It is a congruent number.

It is an unprimeable 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 in 31 ways as a sum of consecutive naturals, for example, 363389 + ... + 363741.

It is an arithmetic number, because the mean of its divisors is an integer number (5256900).

Almost surely, 2^128338445 is an apocalyptic number.

It is an amenable number.

128338445 is a deficient number, since it is larger than the sum of its proper divisors (39882355).

128338445 is a wasteful number, since it uses less digits than its factorization.

128338445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509.

The product of its digits is 92160, while the sum is 38.

The square root of 128338445 is about 11328.6559220412. The cubic root of 128338445 is about 504.4122102741.

The spelling of 128338445 in words is "one hundred twenty-eight million, three hundred thirty-eight thousand, four hundred forty-five".