128446378 has 4 divisors (see below), whose sum is σ = 192669570. Its totient is φ = 64223188.

The previous prime is 128446291. The next prime is 128446393. The reversal of 128446378 is 873644821.

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., 93954249 + 34492129 = 9693^2 + 5873^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32111593 + ... + 32111596.

Almost surely, 2^128446378 is an apocalyptic number.

128446378 is a deficient number, since it is larger than the sum of its proper divisors (64223192).

128446378 is an equidigital number, since it uses as much as digits as its factorization.

128446378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64223191.

The product of its digits is 258048, while the sum is 43.

The square root of 128446378 is about 11333.4186369339. The cubic root of 128446378 is about 504.5535746903.

The spelling of 128446378 in words is "one hundred twenty-eight million, four hundred forty-six thousand, three hundred seventy-eight".