128722274 has 8 divisors (see below), whose sum is σ = 193927260. Its totient is φ = 64079856.

The previous prime is 128722229. The next prime is 128722289. The reversal of 128722274 is 472227821.

It can be written as a sum of positive squares in 2 ways, for example, as 126720049 + 2002225 = 11257^2 + 1415^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140069 + ... + 140984.

Almost surely, 2^128722274 is an apocalyptic number.

128722274 is a deficient number, since it is larger than the sum of its proper divisors (65204986).

128722274 is a wasteful number, since it uses less digits than its factorization.

128722274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281284.

The product of its digits is 25088, while the sum is 35.

The square root of 128722274 is about 11345.5838985924. The cubic root of 128722274 is about 504.9145677785.

The spelling of 128722274 in words is "one hundred twenty-eight million, seven hundred twenty-two thousand, two hundred seventy-four".