646820096 has 72 divisors (see below), whose sum is σ = 1397605440. Its totient is φ = 296994816.

The previous prime is 646820093. The next prime is 646820107. The reversal of 646820096 is 690028646.

It is not an unprimeable number, because it can be changed into a prime (646820093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 874895 + ... + 875633.

Almost surely, 2^646820096 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 646820096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698802720).

646820096 is an abundant number, since it is smaller than the sum of its proper divisors (750785344).

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

646820096 is a wasteful number, since it uses less digits than its factorization.

646820096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 646820096 is about 25432.6580600613. The cubic root of 646820096 is about 864.8242020815.

The spelling of 646820096 in words is "six hundred forty-six million, eight hundred twenty thousand, ninety-six".