128218382 has 4 divisors (see below), whose sum is σ = 192327576. Its totient is φ = 64109190.

The previous prime is 128218381. The next prime is 128218393. The reversal of 128218382 is 283812821.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128218381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32054594 + ... + 32054597.

It is an arithmetic number, because the mean of its divisors is an integer number (48081894).

Almost surely, 2^128218382 is an apocalyptic number.

128218382 is a deficient number, since it is larger than the sum of its proper divisors (64109194).

128218382 is an equidigital number, since it uses as much as digits as its factorization.

128218382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64109193.

The product of its digits is 12288, while the sum is 35.

The square root of 128218382 is about 11323.3555980548. The cubic root of 128218382 is about 504.2548655325.

The spelling of 128218382 in words is "one hundred twenty-eight million, two hundred eighteen thousand, three hundred eighty-two".