646202484 has 36 divisors (see below), whose sum is σ = 1677607204. Its totient is φ = 209578752.

The previous prime is 646202461. The next prime is 646202527. The reversal of 646202484 is 484202646.

It is a happy number.

646202484 is a `hidden beast` number, since 6 + 4 + 620 + 24 + 8 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 222666084 + 423536400 = 14922^2 + 20580^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

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 11 ways as a sum of consecutive naturals, for example, 241237 + ... + 243900.

Almost surely, 2^646202484 is an apocalyptic number.

It is an amenable number.

646202484 is an abundant number, since it is smaller than the sum of its proper divisors (1031404720).

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

646202484 is a wasteful number, since it uses less digits than its factorization.

646202484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485184 (or 485179 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The square root of 646202484 is about 25420.5130554047. The cubic root of 646202484 is about 864.5488571538.

The spelling of 646202484 in words is "six hundred forty-six million, two hundred two thousand, four hundred eighty-four".