128089474 has 4 divisors (see below), whose sum is σ = 192134214. Its totient is φ = 64044736.

The previous prime is 128089459. The next prime is 128089477. The reversal of 128089474 is 474980821.

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., 122257249 + 5832225 = 11057^2 + 2415^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128089474.

It is not an unprimeable number, because it can be changed into a prime (128089477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32022367 + ... + 32022370.

Almost surely, 2^128089474 is an apocalyptic number.

128089474 is a deficient number, since it is larger than the sum of its proper divisors (64044740).

128089474 is an equidigital number, since it uses as much as digits as its factorization.

128089474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64044739.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 128089474 is about 11317.6620377179. The cubic root of 128089474 is about 504.0858198741.

The spelling of 128089474 in words is "one hundred twenty-eight million, eighty-nine thousand, four hundred seventy-four".