128773272 has 16 divisors (see below), whose sum is σ = 321933240. Its totient is φ = 42924416.

The previous prime is 128773247. The next prime is 128773273. The reversal of 128773272 is 272377821.

It is a self number, because there is not a number n which added to its sum of digits gives 128773272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128773273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2682753 + ... + 2682800.

Almost surely, 2^128773272 is an apocalyptic number.

128773272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128773272 is an abundant number, since it is smaller than the sum of its proper divisors (193159968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128773272 is a wasteful number, since it uses less digits than its factorization.

128773272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5365562 (or 5365558 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 128773272 is about 11347.8311584197. The cubic root of 128773272 is about 504.9812390508.

The spelling of 128773272 in words is "one hundred twenty-eight million, seven hundred seventy-three thousand, two hundred seventy-two".