646458246 has 112 divisors (see below), whose sum is σ = 1681261344. Its totient is φ = 182518272.

The previous prime is 646458233. The next prime is 646458247. The reversal of 646458246 is 642854646.

646458246 is a `hidden beast` number, since 6 + 4 + 64 + 582 + 4 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646458247) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 989656 + ... + 990308.

It is an arithmetic number, because the mean of its divisors is an integer number (15011262).

Almost surely, 2^646458246 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646458246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (840630672).

646458246 is an abundant number, since it is smaller than the sum of its proper divisors (1034803098).

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

646458246 is an equidigital number, since it uses as much as digits as its factorization.

646458246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 762 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 45.

The square root of 646458246 is about 25425.5431800385. The cubic root of 646458246 is about 864.6629027171.

The spelling of 646458246 in words is "six hundred forty-six million, four hundred fifty-eight thousand, two hundred forty-six".