128755408 has 20 divisors (see below), whose sum is σ = 250126848. Its totient is φ = 64206560.

The previous prime is 128755397. The next prime is 128755409. The reversal of 128755408 is 804557821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128755409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4378 + ... + 16633.

Almost surely, 2^128755408 is an apocalyptic number.

It is an amenable number.

128755408 is a deficient number, since it is larger than the sum of its proper divisors (121371440).

128755408 is a wasteful number, since it uses less digits than its factorization.

128755408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21402 (or 21396 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 128755408 is about 11347.0440203605. The cubic root of 128755408 is about 504.9578868911.

The spelling of 128755408 in words is "one hundred twenty-eight million, seven hundred fifty-five thousand, four hundred eight".