128379498 has 32 divisors (see below), whose sum is σ = 278174400. Its totient is φ = 39497328.

The previous prime is 128379497. The next prime is 128379521. The reversal of 128379498 is 894973821.

It is a self number, because there is not a number n which added to its sum of digits gives 128379498.

It is not an unprimeable number, because it can be changed into a prime (128379497) 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, 8313 + ... + 18051.

It is an arithmetic number, because the mean of its divisors is an integer number (8692950).

Almost surely, 2^128379498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128379498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139087200).

128379498 is an abundant number, since it is smaller than the sum of its proper divisors (149794902).

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

128379498 is an equidigital number, since it uses as much as digits as its factorization.

128379498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9783 (or 9757 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 128379498 is about 11330.4676867286. The cubic root of 128379498 is about 504.4659884616.

The spelling of 128379498 in words is "one hundred twenty-eight million, three hundred seventy-nine thousand, four hundred ninety-eight".