128650824 has 96 divisors (see below), whose sum is σ = 369720000. Its totient is φ = 40300416.

The previous prime is 128650817. The next prime is 128650829. The reversal of 128650824 is 428056821.

128650824 is a `hidden beast` number, since 128 + 6 + 508 + 24 = 666.

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 (128650829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214477 + ... + 215075.

It is an arithmetic number, because the mean of its divisors is an integer number (3851250).

Almost surely, 2^128650824 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 128650824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184860000).

128650824 is an abundant number, since it is smaller than the sum of its proper divisors (241069176).

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

128650824 is a wasteful number, since it uses less digits than its factorization.

128650824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 780 counting only the distinct ones).

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

The square root of 128650824 is about 11342.4346592784. The cubic root of 128650824 is about 504.8211293451.

The spelling of 128650824 in words is "one hundred twenty-eight million, six hundred fifty thousand, eight hundred twenty-four".