646822704 has 80 divisors (see below), whose sum is σ = 1840060800. Its totient is φ = 194175040.

The previous prime is 646822703. The next prime is 646822717. The reversal of 646822704 is 407228646.

646822704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×646822704² = 836759220819743232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (646822703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6045019 + ... + 6045125.

It is an arithmetic number, because the mean of its divisors is an integer number (23000760).

Almost surely, 2^646822704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646822704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (920030400).

646822704 is an abundant number, since it is smaller than the sum of its proper divisors (1193238096).

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

646822704 is an equidigital number, since it uses as much as digits as its factorization.

646822704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 646822704 is about 25432.7093326684. The cubic root of 646822704 is about 864.8253644131.

The spelling of 646822704 in words is "six hundred forty-six million, eight hundred twenty-two thousand, seven hundred four".