128379798 has 12 divisors (see below), whose sum is σ = 278156268. Its totient is φ = 42793260.

The previous prime is 128379793. The next prime is 128379799. The reversal of 128379798 is 897973821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128379793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3566088 + ... + 3566123.

It is an arithmetic number, because the mean of its divisors is an integer number (23179689).

Almost surely, 2^128379798 is an apocalyptic number.

128379798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128379798 is an abundant number, since it is smaller than the sum of its proper divisors (149776470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128379798 is a wasteful number, since it uses less digits than its factorization.

128379798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7132219 (or 7132216 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 128379798 is about 11330.4809253623. The cubic root of 128379798 is about 504.4663814103.

The spelling of 128379798 in words is "one hundred twenty-eight million, three hundred seventy-nine thousand, seven hundred ninety-eight".