650385 has 24 divisors (see below), whose sum is σ = 1146600. Its totient is φ = 340992.

The previous prime is 650359. The next prime is 650387. The reversal of 650385 is 583056.

650385 is a `hidden beast` number, since 650 + 3 + 8 + 5 = 666.

650385 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 4 ways, for example, as 3969 + 646416 = 63^2 + 804^2 .

It is not a de Polignac number, because 650385 - 2¹⁰ = 649361 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 650385.

It is not an unprimeable number, because it can be changed into a prime (650387) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4291 + ... + 4439.

It is an arithmetic number, because the mean of its divisors is an integer number (47775).

2⁶⁵⁰³⁸⁵ is an apocalyptic number.

It is an amenable number.

650385 is a deficient number, since it is larger than the sum of its proper divisors (496215).

650385 is a wasteful number, since it uses less digits than its factorization.

650385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 650385 is about 806.4645063485. The cubic root of 650385 is about 86.6410098280.

It can be divided in two parts, 650 and 385, that added together give a triangular number (1035 = T₄₅).

The spelling of 650385 in words is "six hundred fifty thousand, three hundred eighty-five".