128607394 has 4 divisors (see below), whose sum is σ = 192911094. Its totient is φ = 64303696.

The previous prime is 128607361. The next prime is 128607407. The reversal of 128607394 is 493706821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493706821 = 19333 ⋅25537.

It can be written as a sum of positive squares in only one way, i.e., 118526769 + 10080625 = 10887^2 + 3175^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 32151847 + ... + 32151850.

Almost surely, 2^128607394 is an apocalyptic number.

128607394 is a deficient number, since it is larger than the sum of its proper divisors (64303700).

128607394 is an equidigital number, since it uses as much as digits as its factorization.

128607394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64303699.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 128607394 is about 11340.5200057140. The cubic root of 128607394 is about 504.7643170411.

The spelling of 128607394 in words is "one hundred twenty-eight million, six hundred seven thousand, three hundred ninety-four".