128801340 has 120 divisors (see below), whose sum is σ = 413674800. Its totient is φ = 33548256.

The previous prime is 128801327. The next prime is 128801341. The reversal of 128801340 is 43108821.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 645 × 387 × 516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128801341) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2995359 + ... + 2995401.

It is an arithmetic number, because the mean of its divisors is an integer number (3447290).

Almost surely, 2^128801340 is an apocalyptic number.

128801340 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 128801340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206837400).

128801340 is an abundant number, since it is smaller than the sum of its proper divisors (284873460).

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

128801340 is an frugal number, since it uses more digits than its factorization.

128801340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 128801340 is about 11349.0678031281. The cubic root of 128801340 is about 505.0179257108.

The spelling of 128801340 in words is "one hundred twenty-eight million, eight hundred one thousand, three hundred forty".