650639385 has 160 divisors (see below), whose sum is σ = 1377471744. Its totient is φ = 292723200.

The previous prime is 650639369. The next prime is 650639411. The reversal of 650639385 is 583936056.

650639385 is a `hidden beast` number, since 6 + 5 + 0 + 639 + 3 + 8 + 5 = 666.

It is not a de Polignac number, because 650639385 - 2⁴ = 650639369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 650639385.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 9163900 + ... + 9163970.

Almost surely, 2^650639385 is an apocalyptic number.

It is an amenable number.

650639385 is an abundant number, since it is smaller than the sum of its proper divisors (726832359).

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

650639385 is a wasteful number, since it uses less digits than its factorization.

650639385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The square root of 650639385 is about 25507.6338573377. The cubic root of 650639385 is about 866.5230431791.

The spelling of 650639385 in words is "six hundred fifty million, six hundred thirty-nine thousand, three hundred eighty-five".