650128138 has 16 divisors (see below), whose sum is σ = 1065996000. Its totient is φ = 294915600.

The previous prime is 650128109. The next prime is 650128151. The reversal of 650128138 is 831821056.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18633 + ... + 40588.

It is an arithmetic number, because the mean of its divisors is an integer number (66624750).

Almost surely, 2^650128138 is an apocalyptic number.

650128138 is a deficient number, since it is larger than the sum of its proper divisors (415867862).

650128138 is a wasteful number, since it uses less digits than its factorization.

650128138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59733.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 650128138 is about 25497.6104370586. The cubic root of 650128138 is about 866.2960237273.

The spelling of 650128138 in words is "six hundred fifty million, one hundred twenty-eight thousand, one hundred thirty-eight".