641840788 has 12 divisors (see below), whose sum is σ = 1131796512. Its totient is φ = 318470360.

The previous prime is 641840713. The next prime is 641840807. The reversal of 641840788 is 887048146.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611920 + ... + 612967.

It is an arithmetic number, because the mean of its divisors is an integer number (94316376).

Almost surely, 2^641840788 is an apocalyptic number.

It is an amenable number.

641840788 is a deficient number, since it is larger than the sum of its proper divisors (489955724).

641840788 is a wasteful number, since it uses less digits than its factorization.

641840788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225022 (or 1225020 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 641840788 is about 25334.5769256169. The cubic root of 641840788 is about 862.5993054601.

The spelling of 641840788 in words is "six hundred forty-one million, eight hundred forty thousand, seven hundred eighty-eight".