128224478 has 4 divisors (see below), whose sum is σ = 192336720. Its totient is φ = 64112238.

The previous prime is 128224451. The next prime is 128224511. The reversal of 128224478 is 874422821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874422821 = 733 ⋅1192937.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32056118 + ... + 32056121.

It is an arithmetic number, because the mean of its divisors is an integer number (48084180).

Almost surely, 2^128224478 is an apocalyptic number.

128224478 is a deficient number, since it is larger than the sum of its proper divisors (64112242).

128224478 is an equidigital number, since it uses as much as digits as its factorization.

128224478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64112241.

The product of its digits is 57344, while the sum is 38.

The square root of 128224478 is about 11323.6247730133. The cubic root of 128224478 is about 504.2628568176.

The spelling of 128224478 in words is "one hundred twenty-eight million, two hundred twenty-four thousand, four hundred seventy-eight".