128040498 has 96 divisors (see below), whose sum is σ = 309868416. Its totient is φ = 38029824.

The previous prime is 128040491. The next prime is 128040529. The reversal of 128040498 is 894040821.

128040498 is a `hidden beast` number, since 128 + 0 + 40 + 498 = 666.

It is not an unprimeable number, because it can be changed into a prime (128040491) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 486715 + ... + 486977.

It is an arithmetic number, because the mean of its divisors is an integer number (3227796).

Almost surely, 2^128040498 is an apocalyptic number.

128040498 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128040498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154934208).

128040498 is an abundant number, since it is smaller than the sum of its proper divisors (181827918).

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

128040498 is a wasteful number, since it uses less digits than its factorization.

128040498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 128040498 is about 11315.4981330916. The cubic root of 128040498 is about 504.0215646480.

The spelling of 128040498 in words is "one hundred twenty-eight million, forty thousand, four hundred ninety-eight".