128504808 has 24 divisors (see below), whose sum is σ = 348034050. Its totient is φ = 42834912.

The previous prime is 128504801. The next prime is 128504851. The reversal of 128504808 is 808405821.

128504808 is a `hidden beast` number, since 128 + 50 + 480 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 105637284 + 22867524 = 10278^2 + 4782^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is not an unprimeable number, because it can be changed into a prime (128504801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 892323 + ... + 892466.

Almost surely, 2^128504808 is an apocalyptic number.

128504808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128504808 is an abundant number, since it is smaller than the sum of its proper divisors (219529242).

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

128504808 is a wasteful number, since it uses less digits than its factorization.

128504808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784801 (or 1784794 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 128504808 is about 11335.9961185597. The cubic root of 128504808 is about 504.6300698957.

The spelling of 128504808 in words is "one hundred twenty-eight million, five hundred four thousand, eight hundred eight".