128078378 has 4 divisors (see below), whose sum is σ = 192117570. Its totient is φ = 64039188.

The previous prime is 128078359. The next prime is 128078417. The reversal of 128078378 is 873870821.

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., 95394289 + 32684089 = 9767^2 + 5717^2 .

It is a super-2 number, since 2×128078378² = 32808141822221768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32019593 + ... + 32019596.

Almost surely, 2^128078378 is an apocalyptic number.

128078378 is a deficient number, since it is larger than the sum of its proper divisors (64039192).

128078378 is an equidigital number, since it uses as much as digits as its factorization.

128078378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64039191.

The product of its (nonzero) digits is 150528, while the sum is 44.

The square root of 128078378 is about 11317.1718198497. The cubic root of 128078378 is about 504.0712636487.

The spelling of 128078378 in words is "one hundred twenty-eight million, seventy-eight thousand, three hundred seventy-eight".