646202004 has 72 divisors (see below), whose sum is σ = 1758919680. Its totient is φ = 184109184.

The previous prime is 646201999. The next prime is 646202017. The reversal of 646202004 is 400202646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 239149 + ... + 241835.

It is an arithmetic number, because the mean of its divisors is an integer number (24429440).

Almost surely, 2^646202004 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 646202004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879459840).

646202004 is an abundant number, since it is smaller than the sum of its proper divisors (1112717676).

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

646202004 is a wasteful number, since it uses less digits than its factorization.

646202004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117 (or 3108 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 646202004 is about 25420.5036142087. The cubic root of 646202004 is about 864.5486430911.

The spelling of 646202004 in words is "six hundred forty-six million, two hundred two thousand, four".