128829426 has 72 divisors (see below), whose sum is σ = 294704592. Its totient is φ = 37514400.

The previous prime is 128829403. The next prime is 128829473. The reversal of 128829426 is 624928821.

Its product of digits (110592) is a multiple of the sum of its prime divisors (256).

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, 610461 + ... + 610671.

Almost surely, 2^128829426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128829426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147352296).

128829426 is an abundant number, since it is smaller than the sum of its proper divisors (165875166).

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

128829426 is a wasteful number, since it uses less digits than its factorization.

128829426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 256 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 128829426 is about 11350.3051060313. The cubic root of 128829426 is about 505.0546305634.

The spelling of 128829426 in words is "one hundred twenty-eight million, eight hundred twenty-nine thousand, four hundred twenty-six".