646327842 has 16 divisors (see below), whose sum is σ = 1295646240. Its totient is φ = 214944192.

The previous prime is 646327837. The next prime is 646327943. The reversal of 646327842 is 248723646.

It is a junction number, because it is equal to n+sod(n) for n = 646327794 and 646327803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121792 + ... + 126987.

It is an arithmetic number, because the mean of its divisors is an integer number (80977890).

Almost surely, 2^646327842 is an apocalyptic number.

646327842 is an abundant number, since it is smaller than the sum of its proper divisors (649318398).

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

646327842 is a wasteful number, since it uses less digits than its factorization.

646327842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249217.

The product of its digits is 387072, while the sum is 42.

The square root of 646327842 is about 25422.9786217115. The cubic root of 646327842 is about 864.6047586764.

The spelling of 646327842 in words is "six hundred forty-six million, three hundred twenty-seven thousand, eight hundred forty-two".