520634646 has 96 divisors (see below), whose sum is σ = 1363654656. Its totient is φ = 140400000.

The previous prime is 520634633. The next prime is 520634657. The reversal of 520634646 is 646436025.

520634646 is a `hidden beast` number, since 5 + 2 + 0 + 6 + 3 + 4 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 520634646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158521 + ... + 161771.

It is an arithmetic number, because the mean of its divisors is an integer number (14204736).

Almost surely, 2^520634646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520634646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681827328).

520634646 is an abundant number, since it is smaller than the sum of its proper divisors (843020010).

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

520634646 is a wasteful number, since it uses less digits than its factorization.

520634646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338 (or 3335 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 520634646 is about 22817.4197927811. The cubic root of 520634646 is about 804.4721645530.

The spelling of 520634646 in words is "five hundred twenty million, six hundred thirty-four thousand, six hundred forty-six".