128232774 has 72 divisors (see below), whose sum is σ = 302402520. Its totient is φ = 40275576.

The previous prime is 128232743. The next prime is 128232781. The reversal of 128232774 is 477232821.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1913889 + ... + 1913955.

It is an arithmetic number, because the mean of its divisors is an integer number (4200035).

Almost surely, 2^128232774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128232774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151201260).

128232774 is an abundant number, since it is smaller than the sum of its proper divisors (174169746).

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

128232774 is an equidigital number, since it uses as much as digits as its factorization.

128232774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 95 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 128232774 is about 11323.9910808866. The cubic root of 128232774 is about 504.2737316898.

It can be divided in two parts, 1282327 and 74, that added together give a triangular number (1282401 = T₁₆₀₁).

The spelling of 128232774 in words is "one hundred twenty-eight million, two hundred thirty-two thousand, seven hundred seventy-four".