646460244 has 24 divisors (see below), whose sum is σ = 1676008320. Its totient is φ = 215486712.

The previous prime is 646460233. The next prime is 646460251. The reversal of 646460244 is 442064646.

It is a happy number.

646460244 is a `hidden beast` number, since 6 + 4 + 6 + 4 + 602 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 646460199 and 646460208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2992764 + ... + 2992979.

It is an arithmetic number, because the mean of its divisors is an integer number (69833680).

Almost surely, 2^646460244 is an apocalyptic number.

It is an amenable number.

646460244 is an abundant number, since it is smaller than the sum of its proper divisors (1029548076).

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

646460244 is a wasteful number, since it uses less digits than its factorization.

646460244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5985756 (or 5985748 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 646460244 is about 25425.5824712041. The cubic root of 646460244 is about 864.6637935170.

It can be divided in two parts, 6464602 and 44, that added together give a palindrome (6464646).

The spelling of 646460244 in words is "six hundred forty-six million, four hundred sixty thousand, two hundred forty-four".