128225240 has 128 divisors (see below), whose sum is σ = 351086400. Its totient is φ = 41502720.

The previous prime is 128225213. The next prime is 128225261. The reversal of 128225240 is 42522821.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165494 + ... + 166266.

Almost surely, 2^128225240 is an apocalyptic number.

128225240 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 128225240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175543200).

128225240 is an abundant number, since it is smaller than the sum of its proper divisors (222861160).

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

128225240 is a wasteful number, since it uses less digits than its factorization.

128225240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 833 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 128225240 is about 11323.6584194332. The cubic root of 128225240 is about 504.2638557105.

The spelling of 128225240 in words is "one hundred twenty-eight million, two hundred twenty-five thousand, two hundred forty".