128032422 has 64 divisors (see below), whose sum is σ = 302400000. Its totient is φ = 35377920.

The previous prime is 128032417. The next prime is 128032427. The reversal of 128032422 is 224230821.

It is an interprime number because it is at equal distance from previous prime (128032417) and next prime (128032427).

It is a junction number, because it is equal to n+sod(n) for n = 128032392 and 128032401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128032427) 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, 256329 + ... + 256827.

It is an arithmetic number, because the mean of its divisors is an integer number (4725000).

Almost surely, 2^128032422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128032422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151200000).

128032422 is an abundant number, since it is smaller than the sum of its proper divisors (174367578).

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

128032422 is a wasteful number, since it uses less digits than its factorization.

128032422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 128032422 is about 11315.1412717650. The cubic root of 128032422 is about 504.0109675744.

It can be divided in two parts, 12803 and 2422, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 128032422 in words is "one hundred twenty-eight million, thirty-two thousand, four hundred twenty-two".