128719850 has 24 divisors (see below), whose sum is σ = 273622368. Its totient is φ = 44132400.

The previous prime is 128719849. The next prime is 128719853. The reversal of 128719850 is 58917821.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128719798 and 128719807.

It is not an unprimeable number, because it can be changed into a prime (128719853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183536 + ... + 184235.

It is an arithmetic number, because the mean of its divisors is an integer number (11400932).

Almost surely, 2^128719850 is an apocalyptic number.

128719850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128719850 is an abundant number, since it is smaller than the sum of its proper divisors (144902518).

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

128719850 is a wasteful number, since it uses less digits than its factorization.

128719850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367790 (or 367785 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 128719850 is about 11345.4770723844. The cubic root of 128719850 is about 504.9113983695.

The spelling of 128719850 in words is "one hundred twenty-eight million, seven hundred nineteen thousand, eight hundred fifty".