128943408 has 90 divisors (see below), whose sum is σ = 368612692. Its totient is φ = 38811520.

The previous prime is 128943391. The next prime is 128943421. The reversal of 128943408 is 804349821.

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, 865318 + ... + 865466.

Almost surely, 2^128943408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128943408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184306346).

128943408 is an abundant number, since it is smaller than the sum of its proper divisors (239669284).

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

128943408 is a wasteful number, since it uses less digits than its factorization.

128943408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 128943408 is about 11355.3250944216. The cubic root of 128943408 is about 505.2035359015.

The spelling of 128943408 in words is "one hundred twenty-eight million, nine hundred forty-three thousand, four hundred eight".