128481534 has 48 divisors (see below), whose sum is σ = 295850880. Its totient is φ = 40182480.

The previous prime is 128481511. The next prime is 128481541. The reversal of 128481534 is 435184821.

128481534 is a `hidden beast` number, since 128 + 481 + 53 + 4 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 34839 + ... + 38349.

It is an arithmetic number, because the mean of its divisors is an integer number (6163560).

Almost surely, 2^128481534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128481534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147925440).

128481534 is an abundant number, since it is smaller than the sum of its proper divisors (167369346).

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

128481534 is a wasteful number, since it uses less digits than its factorization.

128481534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645 (or 3642 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 128481534 is about 11334.9695191474. The cubic root of 128481534 is about 504.5996028921.

The spelling of 128481534 in words is "one hundred twenty-eight million, four hundred eighty-one thousand, five hundred thirty-four".