128382650 has 24 divisors (see below), whose sum is σ = 260501184. Its totient is φ = 46684400.

The previous prime is 128382647. The next prime is 128382659. The reversal of 128382650 is 56283821.

It is a self number, because there is not a number n which added to its sum of digits gives 128382650.

It is not an unprimeable number, because it can be changed into a prime (128382659) 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, 116162 + ... + 117261.

It is an arithmetic number, because the mean of its divisors is an integer number (10854216).

Almost surely, 2^128382650 is an apocalyptic number.

128382650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128382650 is an abundant number, since it is smaller than the sum of its proper divisors (132118534).

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

128382650 is a wasteful number, since it uses less digits than its factorization.

128382650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233446 (or 233441 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 128382650 is about 11330.6067798684. The cubic root of 128382650 is about 504.4701170123.

The spelling of 128382650 in words is "one hundred twenty-eight million, three hundred eighty-two thousand, six hundred fifty".