128443650 has 48 divisors (see below), whose sum is σ = 327163584. Its totient is φ = 33324480.

The previous prime is 128443607. The next prime is 128443691. The reversal of 128443650 is 56344821.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6022 + ... + 17121.

It is an arithmetic number, because the mean of its divisors is an integer number (6815908).

Almost surely, 2^128443650 is an apocalyptic number.

128443650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128443650 is an abundant number, since it is smaller than the sum of its proper divisors (198719934).

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

128443650 is a wasteful number, since it uses less digits than its factorization.

128443650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23195 (or 23190 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 128443650 is about 11333.2982842595. The cubic root of 128443650 is about 504.5500026890.

The spelling of 128443650 in words is "one hundred twenty-eight million, four hundred forty-three thousand, six hundred fifty".