128872758 has 64 divisors (see below), whose sum is σ = 306528768. Its totient is φ = 35354880.

The previous prime is 128872753. The next prime is 128872769. The reversal of 128872758 is 857278821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128872753) 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, 114816 + ... + 115932.

It is an arithmetic number, because the mean of its divisors is an integer number (4789512).

Almost surely, 2^128872758 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128872758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153264384).

128872758 is an abundant number, since it is smaller than the sum of its proper divisors (177656010).

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

128872758 is a wasteful number, since it uses less digits than its factorization.

128872758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237.

The product of its digits is 501760, while the sum is 48.

The square root of 128872758 is about 11352.2137929128. The cubic root of 128872758 is about 505.1112495485. Note that the first 3 decimals are identical.

The spelling of 128872758 in words is "one hundred twenty-eight million, eight hundred seventy-two thousand, seven hundred fifty-eight".