641887488 has 432 divisors, whose sum is σ = 2244802560. Its totient is φ = 174182400.

The previous prime is 641887487. The next prime is 641887489. The reversal of 641887488 is 884788146.

It is an interprime number because it is at equal distance from previous prime (641887487) and next prime (641887489).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641887481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14927595 + ... + 14927637.

Almost surely, 2^641887488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641887488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1122401280).

641887488 is an abundant number, since it is smaller than the sum of its proper divisors (1602915072).

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

641887488 is a wasteful number, since it uses less digits than its factorization.

641887488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 109 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 54.

The square root of 641887488 is about 25335.4985741351. The cubic root of 641887488 is about 862.6202257108.

The spelling of 641887488 in words is "six hundred forty-one million, eight hundred eighty-seven thousand, four hundred eighty-eight".