128273652 has 96 divisors (see below), whose sum is σ = 360671360. Its totient is φ = 39191040.

The previous prime is 128273627. The next prime is 128273659. The reversal of 128273652 is 256372821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128273659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296028 + ... + 296460.

Almost surely, 2^128273652 is an apocalyptic number.

128273652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128273652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180335680).

128273652 is an abundant number, since it is smaller than the sum of its proper divisors (232397708).

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

128273652 is a wasteful number, since it uses less digits than its factorization.

128273652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 662 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 128273652 is about 11325.7958660749. The cubic root of 128273652 is about 504.3273100665.

The spelling of 128273652 in words is "one hundred twenty-eight million, two hundred seventy-three thousand, six hundred fifty-two".