128224479 has 8 divisors (see below), whose sum is σ = 171019440. Its totient is φ = 85456256.

The previous prime is 128224451. The next prime is 128224511. The reversal of 128224479 is 974422821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128224479 - 2¹² = 128220383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128224429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11857 + ... + 19925.

It is an arithmetic number, because the mean of its divisors is an integer number (21377430).

Almost surely, 2^128224479 is an apocalyptic number.

128224479 is a deficient number, since it is larger than the sum of its proper divisors (42794961).

128224479 is an equidigital number, since it uses as much as digits as its factorization.

128224479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13369.

The product of its digits is 64512, while the sum is 39.

The square root of 128224479 is about 11323.6248171687. The cubic root of 128224479 is about 504.2628581285.

The spelling of 128224479 in words is "one hundred twenty-eight million, two hundred twenty-four thousand, four hundred seventy-nine".