128770422 has 64 divisors (see below), whose sum is σ = 300464640. Its totient is φ = 36396800.

The previous prime is 128770409. The next prime is 128770487. The reversal of 128770422 is 224077821.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61204 + ... + 63272.

It is an arithmetic number, because the mean of its divisors is an integer number (4694760).

Almost surely, 2^128770422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128770422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150232320).

128770422 is an abundant number, since it is smaller than the sum of its proper divisors (171694218).

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

128770422 is a wasteful number, since it uses less digits than its factorization.

128770422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 128770422 is about 11347.7055830683. The cubic root of 128770422 is about 504.9775136215.

The spelling of 128770422 in words is "one hundred twenty-eight million, seven hundred seventy thousand, four hundred twenty-two".