128808240 has 160 divisors (see below), whose sum is σ = 440971776. Its totient is φ = 30842880.

The previous prime is 128808223. The next prime is 128808241. The reversal of 128808240 is 42808821.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128808241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255829 + ... + 256331.

Almost surely, 2^128808240 is an apocalyptic number.

128808240 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 128808240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220485888).

128808240 is an abundant number, since it is smaller than the sum of its proper divisors (312163536).

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

128808240 is a wasteful number, since it uses less digits than its factorization.

128808240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 128808240 is about 11349.3717887820. The cubic root of 128808240 is about 505.0269436332.

The spelling of 128808240 in words is "one hundred twenty-eight million, eight hundred eight thousand, two hundred forty".