128849198 has 4 divisors (see below), whose sum is σ = 193273800. Its totient is φ = 64424598.

The previous prime is 128849191. The next prime is 128849219. The reversal of 128849198 is 891948821.

It is a happy number.

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 (128849191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32212298 + ... + 32212301.

It is an arithmetic number, because the mean of its divisors is an integer number (48318450).

Almost surely, 2^128849198 is an apocalyptic number.

128849198 is a deficient number, since it is larger than the sum of its proper divisors (64424602).

128849198 is an equidigital number, since it uses as much as digits as its factorization.

128849198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64424601.

The product of its digits is 331776, while the sum is 50.

The square root of 128849198 is about 11351.1760624175. The cubic root of 128849198 is about 505.0804668692.

The spelling of 128849198 in words is "one hundred twenty-eight million, eight hundred forty-nine thousand, one hundred ninety-eight".