128102938 has 4 divisors (see below), whose sum is σ = 192154410. Its totient is φ = 64051468.

The previous prime is 128102929. The next prime is 128102963. The reversal of 128102938 is 839201821.

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

It can be written as a sum of positive squares in only one way, i.e., 123143409 + 4959529 = 11097^2 + 2227^2 .

It is an unprimeable number.

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, 32025733 + ... + 32025736.

Almost surely, 2^128102938 is an apocalyptic number.

128102938 is a deficient number, since it is larger than the sum of its proper divisors (64051472).

128102938 is an equidigital number, since it uses as much as digits as its factorization.

128102938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64051471.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 128102938 is about 11318.2568445852. The cubic root of 128102938 is about 504.1034814182.

The spelling of 128102938 in words is "one hundred twenty-eight million, one hundred two thousand, nine hundred thirty-eight".