128388408 has 32 divisors (see below), whose sum is σ = 326236560. Its totient is φ = 42094080.

The previous prime is 128388373. The next prime is 128388413. The reversal of 128388408 is 804883821.

It is a self number, because there is not a number n which added to its sum of digits gives 128388408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42385 + ... + 45312.

Almost surely, 2^128388408 is an apocalyptic number.

It is an amenable number.

128388408 is an abundant number, since it is smaller than the sum of its proper divisors (197848152).

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

128388408 is a wasteful number, since it uses less digits than its factorization.

128388408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87767 (or 87763 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 42.

The square root of 128388408 is about 11330.8608675599. The cubic root of 128388408 is about 504.4776587777.

The spelling of 128388408 in words is "one hundred twenty-eight million, three hundred eighty-eight thousand, four hundred eight".