128841132420 has 288 divisors, whose sum is σ = 524735527680. Its totient is φ = 24712750080.

The previous prime is 128841132403. The next prime is 128841132437. The reversal of 128841132420 is 24231148821.

128841132420 is a `hidden beast` number, since 1 + 28 + 84 + 1 + 132 + 420 = 666.

It is an interprime number because it is at equal distance from previous prime (128841132403) and next prime (128841132437).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 177355 + ... + 537714.

It is an arithmetic number, because the mean of its divisors is an integer number (1821998360).

Almost surely, 2^128841132420 is an apocalyptic number.

128841132420 is a gapful number since it is divisible by the number (10) 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 128841132420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262367763840).

128841132420 is an abundant number, since it is smaller than the sum of its proper divisors (395894395260).

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

128841132420 is a wasteful number, since it uses less digits than its factorization.

128841132420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715115 (or 715110 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The spelling of 128841132420 in words is "one hundred twenty-eight billion, eight hundred forty-one million, one hundred thirty-two thousand, four hundred twenty".