646784350 has 12 divisors (see below), whose sum is σ = 1203018984. Its totient is φ = 258713720.

The previous prime is 646784317. The next prime is 646784351. The reversal of 646784350 is 53487646.

646784350 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 646784297 and 646784306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646784351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6467794 + ... + 6467893.

It is an arithmetic number, because the mean of its divisors is an integer number (100251582).

Almost surely, 2^646784350 is an apocalyptic number.

646784350 is a deficient number, since it is larger than the sum of its proper divisors (556234634).

646784350 is a wasteful number, since it uses less digits than its factorization.

646784350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12935699 (or 12935694 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The square root of 646784350 is about 25431.9552925055. The cubic root of 646784350 is about 864.8082705133.

It can be divided in two parts, 646 and 784350, that added together give a square (784996 = 886²).

The spelling of 646784350 in words is "six hundred forty-six million, seven hundred eighty-four thousand, three hundred fifty".