128483640 has 96 divisors (see below), whose sum is σ = 420189120. Its totient is φ = 34047744.

The previous prime is 128483633. The next prime is 128483687. The reversal of 128483640 is 46384821.

128483640 is a `hidden beast` number, since 1 + 2 + 8 + 4 + 8 + 3 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 128483595 and 128483604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61249 + ... + 63311.

It is an arithmetic number, because the mean of its divisors is an integer number (4376970).

Almost surely, 2^128483640 is an apocalyptic number.

128483640 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 128483640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210094560).

128483640 is an abundant number, since it is smaller than the sum of its proper divisors (291705480).

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

128483640 is a wasteful number, since it uses less digits than its factorization.

128483640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253 (or 2246 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 128483640 is about 11335.0624171197. The cubic root of 128483640 is about 504.6023599185.

The spelling of 128483640 in words is "one hundred twenty-eight million, four hundred eighty-three thousand, six hundred forty".