128875750 has 32 divisors (see below), whose sum is σ = 242596224. Its totient is φ = 51264000.

The previous prime is 128875741. The next prime is 128875753. The reversal of 128875750 is 57578821.

It is a junction number, because it is equal to n+sod(n) for n = 128875697 and 128875706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128875753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46915 + ... + 49585.

It is an arithmetic number, because the mean of its divisors is an integer number (7581132).

Almost surely, 2^128875750 is an apocalyptic number.

128875750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128875750 is a deficient number, since it is larger than the sum of its proper divisors (113720474).

128875750 is a wasteful number, since it uses less digits than its factorization.

128875750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881 (or 2871 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 43.

The square root of 128875750 is about 11352.3455726119. The cubic root of 128875750 is about 505.1151585234.

The spelling of 128875750 in words is "one hundred twenty-eight million, eight hundred seventy-five thousand, seven hundred fifty".