646312842 has 48 divisors (see below), whose sum is σ = 1633070400. Its totient is φ = 184659048.

The previous prime is 646312819. The next prime is 646312847. The reversal of 646312842 is 248213646.

646312842 is a `hidden beast` number, since 646 + 3 + 1 + 2 + 8 + 4 + 2 = 666.

646312842 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 = 646312797 and 646312806.

It is not an unprimeable number, because it can be changed into a prime (646312847) 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, 46168 + ... + 58515.

It is an arithmetic number, because the mean of its divisors is an integer number (34022300).

Almost surely, 2^646312842 is an apocalyptic number.

646312842 is an abundant number, since it is smaller than the sum of its proper divisors (986757558).

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

646312842 is a wasteful number, since it uses less digits than its factorization.

646312842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104712 (or 104695 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 646312842 is about 25422.6836112949. The cubic root of 646312842 is about 864.5980700318.

The spelling of 646312842 in words is "six hundred forty-six million, three hundred twelve thousand, eight hundred forty-two".