128538908 has 12 divisors (see below), whose sum is σ = 225150240. Its totient is φ = 64210272.

The previous prime is 128538899. The next prime is 128538919. The reversal of 128538908 is 809835821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9716 + ... + 18747.

It is an arithmetic number, because the mean of its divisors is an integer number (18762520).

Almost surely, 2^128538908 is an apocalyptic number.

It is an amenable number.

128538908 is a deficient number, since it is larger than the sum of its proper divisors (96611332).

128538908 is a wasteful number, since it uses less digits than its factorization.

128538908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29596 (or 29594 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 128538908 is about 11337.5000771775. The cubic root of 128538908 is about 504.6747021130.

The spelling of 128538908 in words is "one hundred twenty-eight million, five hundred thirty-eight thousand, nine hundred eight".