128380538 has 16 divisors (see below), whose sum is σ = 226237536. Its totient is φ = 53865840.

The previous prime is 128380537. The next prime is 128380541. The reversal of 128380538 is 835083821.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128380537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224156 + ... + 224727.

It is an arithmetic number, because the mean of its divisors is an integer number (14139846).

Almost surely, 2^128380538 is an apocalyptic number.

128380538 is a deficient number, since it is larger than the sum of its proper divisors (97856998).

128380538 is a wasteful number, since it uses less digits than its factorization.

128380538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448909.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 128380538 is about 11330.5135805929. The cubic root of 128380538 is about 504.4673506812.

The spelling of 128380538 in words is "one hundred twenty-eight million, three hundred eighty thousand, five hundred thirty-eight".