641676940 has 24 divisors (see below), whose sum is σ = 1383942672. Its totient is φ = 249733440.

The previous prime is 641676923. The next prime is 641676961. The reversal of 641676940 is 49676146.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432826 + ... + 434305.

It is an arithmetic number, because the mean of its divisors is an integer number (57664278).

Almost surely, 2^641676940 is an apocalyptic number.

It is an amenable number.

641676940 is an abundant number, since it is smaller than the sum of its proper divisors (742265732).

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

641676940 is a wasteful number, since it uses less digits than its factorization.

641676940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867177 (or 867175 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 641676940 is about 25331.3430358518. The cubic root of 641676940 is about 862.5258982632.

The spelling of 641676940 in words is "six hundred forty-one million, six hundred seventy-six thousand, nine hundred forty".