646202130 has 128 divisors (see below), whose sum is σ = 1937571840. Its totient is φ = 134507520.

The previous prime is 646202083. The next prime is 646202143. The reversal of 646202130 is 31202646.

It is a self number, because there is not a number n which added to its sum of digits gives 646202130.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 107751 + ... + 113589.

It is an arithmetic number, because the mean of its divisors is an integer number (15137280).

Almost surely, 2^646202130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646202130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968785920).

646202130 is an abundant number, since it is smaller than the sum of its proper divisors (1291369710).

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

646202130 is a wasteful number, since it uses less digits than its factorization.

646202130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5904.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 646202130 is about 25420.5060925230. The cubic root of 646202130 is about 864.5486992826.

Adding to 646202130 its reverse (31202646), we get a palindrome (677404776).

The spelling of 646202130 in words is "six hundred forty-six million, two hundred two thousand, one hundred thirty".