646539348 has 192 divisors, whose sum is σ = 1950842880. Its totient is φ = 162086400.

The previous prime is 646539323. The next prime is 646539349. The reversal of 646539348 is 843935646.

It is a junction number, because it is equal to n+sod(n) for n = 646539297 and 646539306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646539349) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2403358 + ... + 2403626.

It is an arithmetic number, because the mean of its divisors is an integer number (10160640).

Almost surely, 2^646539348 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 646539348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975421440).

646539348 is an abundant number, since it is smaller than the sum of its proper divisors (1304303532).

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

646539348 is a wasteful number, since it uses less digits than its factorization.

646539348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 396 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 48.

The square root of 646539348 is about 25427.1380221998. The cubic root of 646539348 is about 864.6990602255.

The spelling of 646539348 in words is "six hundred forty-six million, five hundred thirty-nine thousand, three hundred forty-eight".