647068842 has 48 divisors (see below), whose sum is σ = 1609520640. Its totient is φ = 184039776.

The previous prime is 647068831. The next prime is 647068843. The reversal of 647068842 is 248860746.

647068842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (647068843) 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, 16584 + ... + 39612.

It is an arithmetic number, because the mean of its divisors is an integer number (33531680).

Almost surely, 2^647068842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647068842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804760320).

647068842 is an abundant number, since it is smaller than the sum of its proper divisors (962451798).

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

647068842 is a wasteful number, since it uses less digits than its factorization.

647068842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23267 (or 23264 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 647068842 is about 25437.5478771048. The cubic root of 647068842 is about 864.9350489728.

The spelling of 647068842 in words is "six hundred forty-seven million, sixty-eight thousand, eight hundred forty-two".