128833056 has 108 divisors (see below), whose sum is σ = 402812046. Its totient is φ = 39029760.

The previous prime is 128833043. The next prime is 128833069. The reversal of 128833056 is 650338821.

It is an interprime number because it is at equal distance from previous prime (128833043) and next prime (128833069).

It can be written as a sum of positive squares in only one way, i.e., 125888400 + 2944656 = 11220^2 + 1716^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 128833056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33000 + ... + 36696.

Almost surely, 2^128833056 is an apocalyptic number.

128833056 is a gapful number since it is divisible by the number (16) 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 128833056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201406023).

128833056 is an abundant number, since it is smaller than the sum of its proper divisors (273978990).

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

128833056 is a wasteful number, since it uses less digits than its factorization.

128833056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3735 (or 3713 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 128833056 is about 11350.4650125006. The cubic root of 128833056 is about 505.0593741254.

The spelling of 128833056 in words is "one hundred twenty-eight million, eight hundred thirty-three thousand, fifty-six".