650009128 has 16 divisors (see below), whose sum is σ = 1219042260. Its totient is φ = 324931200.

The previous prime is 650009123. The next prime is 650009137. The reversal of 650009128 is 821900056.

650009128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 634939204 + 15069924 = 25198^2 + 3882^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 650009128.

It is not an unprimeable number, because it can be changed into a prime (650009123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54418 + ... + 65278.

Almost surely, 2^650009128 is an apocalyptic number.

It is an amenable number.

650009128 is a deficient number, since it is larger than the sum of its proper divisors (569033132).

650009128 is a wasteful number, since it uses less digits than its factorization.

650009128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18348 (or 18344 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 650009128 is about 25495.2765821436. The cubic root of 650009128 is about 866.2431602094.

The spelling of 650009128 in words is "six hundred fifty million, nine thousand, one hundred twenty-eight".