641929328 has 10 divisors (see below), whose sum is σ = 1243738104. Its totient is φ = 320964656.

The previous prime is 641929289. The next prime is 641929331. The reversal of 641929328 is 823929146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060276 + ... + 20060307.

Almost surely, 2^641929328 is an apocalyptic number.

It is an amenable number.

641929328 is a deficient number, since it is larger than the sum of its proper divisors (601808776).

641929328 is a wasteful number, since it uses less digits than its factorization.

641929328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40120591 (or 40120585 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 641929328 is about 25336.3242795793. The cubic root of 641929328 is about 862.6389679601.

The spelling of 641929328 in words is "six hundred forty-one million, nine hundred twenty-nine thousand, three hundred twenty-eight".