128389382 has 16 divisors (see below), whose sum is σ = 212175504. Its totient is φ = 57780000.

The previous prime is 128389367. The next prime is 128389439. The reversal of 128389382 is 283983821.

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, 26669 + ... + 31112.

It is an arithmetic number, because the mean of its divisors is an integer number (13260969).

Almost surely, 2^128389382 is an apocalyptic number.

128389382 is a deficient number, since it is larger than the sum of its proper divisors (83786122).

128389382 is a wasteful number, since it uses less digits than its factorization.

128389382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57895.

The product of its digits is 165888, while the sum is 44.

The square root of 128389382 is about 11330.9038474431. The cubic root of 128389382 is about 504.4789344900.

The spelling of 128389382 in words is "one hundred twenty-eight million, three hundred eighty-nine thousand, three hundred eighty-two".