128198078 has 8 divisors (see below), whose sum is σ = 192757320. Its totient is φ = 63945640.

The previous prime is 128198069. The next prime is 128198087. The reversal of 128198078 is 870891821.

It is an interprime number because it is at equal distance from previous prime (128198069) and next prime (128198087).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75653 + ... + 77328.

It is an arithmetic number, because the mean of its divisors is an integer number (24094665).

Almost surely, 2^128198078 is an apocalyptic number.

128198078 is a deficient number, since it is larger than the sum of its proper divisors (64559242).

128198078 is a wasteful number, since it uses less digits than its factorization.

128198078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153402.

The product of its (nonzero) digits is 64512, while the sum is 44.

The square root of 128198078 is about 11322.4590085370. The cubic root of 128198078 is about 504.2282470630.

The spelling of 128198078 in words is "one hundred twenty-eight million, one hundred ninety-eight thousand, seventy-eight".