641728352 has 12 divisors (see below), whose sum is σ = 1263402756. Its totient is φ = 320864160.

The previous prime is 641728343. The next prime is 641728369. The reversal of 641728352 is 253827146.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026974 + ... + 10027037.

It is an arithmetic number, because the mean of its divisors is an integer number (105283563).

Almost surely, 2^641728352 is an apocalyptic number.

It is an amenable number.

641728352 is a deficient number, since it is larger than the sum of its proper divisors (621674404).

641728352 is a wasteful number, since it uses less digits than its factorization.

641728352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20054021 (or 20054013 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 641728352 is about 25332.3578057788. The cubic root of 641728352 is about 862.5489332176.

The spelling of 641728352 in words is "six hundred forty-one million, seven hundred twenty-eight thousand, three hundred fifty-two".