646022630 has 48 divisors (see below), whose sum is σ = 1282820112. Its totient is φ = 234062400.

The previous prime is 646022561. The next prime is 646022639. The reversal of 646022630 is 36220646.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 646022593 and 646022602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646022639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 399704 + ... + 401316.

It is an arithmetic number, because the mean of its divisors is an integer number (26725419).

Almost surely, 2^646022630 is an apocalyptic number.

646022630 is a deficient number, since it is larger than the sum of its proper divisors (636797482).

646022630 is a wasteful number, since it uses less digits than its factorization.

646022630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973 (or 1962 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 646022630 is about 25416.9752330996. The cubic root of 646022630 is about 864.4686413278.

The spelling of 646022630 in words is "six hundred forty-six million, twenty-two thousand, six hundred thirty".