128198472 has 64 divisors (see below), whose sum is σ = 345643200. Its totient is φ = 39490560.

The previous prime is 128198471. The next prime is 128198509. The reversal of 128198472 is 274891821.

It is not an unprimeable number, because it can be changed into a prime (128198471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15268 + ... + 22124.

It is an arithmetic number, because the mean of its divisors is an integer number (5400675).

Almost surely, 2^128198472 is an apocalyptic number.

128198472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128198472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172821600).

128198472 is an abundant number, since it is smaller than the sum of its proper divisors (217444728).

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

128198472 is a wasteful number, since it uses less digits than its factorization.

128198472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6926 (or 6922 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 128198472 is about 11322.4764075709. The cubic root of 128198472 is about 504.2287636223.

The spelling of 128198472 in words is "one hundred twenty-eight million, one hundred ninety-eight thousand, four hundred seventy-two".