128418838 has 4 divisors (see below), whose sum is σ = 192628260. Its totient is φ = 64209418.

The previous prime is 128418827. The next prime is 128418839. The reversal of 128418838 is 838814821.

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

It is a junction number, because it is equal to n+sod(n) for n = 128418794 and 128418803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128418839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32104708 + ... + 32104711.

It is an arithmetic number, because the mean of its divisors is an integer number (48157065).

Almost surely, 2^128418838 is an apocalyptic number.

128418838 is a deficient number, since it is larger than the sum of its proper divisors (64209422).

128418838 is an equidigital number, since it uses as much as digits as its factorization.

128418838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64209421.

The product of its digits is 98304, while the sum is 43.

The square root of 128418838 is about 11332.2035809458. The cubic root of 128418838 is about 504.5175119149.

The spelling of 128418838 in words is "one hundred twenty-eight million, four hundred eighteen thousand, eight hundred thirty-eight".