128481808 has 80 divisors (see below), whose sum is σ = 310535680. Its totient is φ = 50139648.

The previous prime is 128481739. The next prime is 128481817. The reversal of 128481808 is 808184821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114466 + ... + 115582.

It is an arithmetic number, because the mean of its divisors is an integer number (3881696).

Almost surely, 2^128481808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128481808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155267840).

128481808 is an abundant number, since it is smaller than the sum of its proper divisors (182053872).

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

128481808 is a wasteful number, since it uses less digits than its factorization.

128481808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 40.

The square root of 128481808 is about 11334.9816056313. The cubic root of 128481808 is about 504.5999615952.

The spelling of 128481808 in words is "one hundred twenty-eight million, four hundred eighty-one thousand, eight hundred eight".