128628274 has 16 divisors (see below), whose sum is σ = 196156800. Its totient is φ = 63249264.

The previous prime is 128628221. The next prime is 128628281. The reversal of 128628274 is 472826821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42297 + ... + 45235.

It is an arithmetic number, because the mean of its divisors is an integer number (12259800).

Almost surely, 2^128628274 is an apocalyptic number.

128628274 is a deficient number, since it is larger than the sum of its proper divisors (67528526).

128628274 is a wasteful number, since it uses less digits than its factorization.

128628274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297.

The product of its digits is 86016, while the sum is 40.

The square root of 128628274 is about 11341.4405610575. The cubic root of 128628274 is about 504.7916324965.

The spelling of 128628274 in words is "one hundred twenty-eight million, six hundred twenty-eight thousand, two hundred seventy-four".