646604352 has 84 divisors (see below), whose sum is σ = 1950953680. Its totient is φ = 204187392.

The previous prime is 646604347. The next prime is 646604353. The reversal of 646604352 is 253406646.

646604352 is a `hidden beast` number, since 6 + 46 + 604 + 3 + 5 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (646604353) by changing a digit.

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, 18598 + ... + 40485.

Almost surely, 2^646604352 is an apocalyptic number.

It is an amenable number.

646604352 is an abundant number, since it is smaller than the sum of its proper divisors (1304349328).

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

646604352 is a wasteful number, since it uses less digits than its factorization.

646604352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59120 (or 59107 counting only the distinct ones).

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

The square root of 646604352 is about 25428.4162306660. The cubic root of 646604352 is about 864.7280386186.

The spelling of 646604352 in words is "six hundred forty-six million, six hundred four thousand, three hundred fifty-two".