128276378 has 4 divisors (see below), whose sum is σ = 192414570. Its totient is φ = 64138188.

The previous prime is 128276371. The next prime is 128276383. The reversal of 128276378 is 873672821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 128210329 + 66049 = 11323^2 + 257^2 .

It is not an unprimeable number, because it can be changed into a prime (128276371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32069093 + ... + 32069096.

Almost surely, 2^128276378 is an apocalyptic number.

128276378 is a deficient number, since it is larger than the sum of its proper divisors (64138192).

128276378 is an equidigital number, since it uses as much as digits as its factorization.

128276378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64138191.

The product of its digits is 225792, while the sum is 44.

The square root of 128276378 is about 11325.9162101792. The cubic root of 128276378 is about 504.3308826019.

The spelling of 128276378 in words is "one hundred twenty-eight million, two hundred seventy-six thousand, three hundred seventy-eight".