128352240 has 120 divisors (see below), whose sum is σ = 436110480. Its totient is φ = 33825792.

The previous prime is 128352233. The next prime is 128352241. The reversal of 128352240 is 42253821.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128352241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63079 + ... + 65081.

It is an arithmetic number, because the mean of its divisors is an integer number (3634254).

Almost surely, 2^128352240 is an apocalyptic number.

128352240 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 128352240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218055240).

128352240 is an abundant number, since it is smaller than the sum of its proper divisors (307758240).

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

128352240 is a wasteful number, since it uses less digits than its factorization.

128352240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111 (or 2102 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 128352240 is about 11329.2647599039. The cubic root of 128352240 is about 504.4302825858.

The spelling of 128352240 in words is "one hundred twenty-eight million, three hundred fifty-two thousand, two hundred forty".