128415650 has 48 divisors (see below), whose sum is σ = 262483200. Its totient is φ = 46353600.

The previous prime is 128415631. The next prime is 128415659. The reversal of 128415650 is 56514821.

128415650 = 499² + 500² + ... + 798².

It is not an unprimeable number, because it can be changed into a prime (128415659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81167 + ... + 82733.

It is an arithmetic number, because the mean of its divisors is an integer number (5468400).

Almost surely, 2^128415650 is an apocalyptic number.

128415650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128415650 is an abundant number, since it is smaller than the sum of its proper divisors (134067550).

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

128415650 is a wasteful number, since it uses less digits than its factorization.

128415650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739 (or 1734 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 128415650 is about 11332.0629189923. The cubic root of 128415650 is about 504.5133369948.

The spelling of 128415650 in words is "one hundred twenty-eight million, four hundred fifteen thousand, six hundred fifty".