641029284 has 108 divisors (see below), whose sum is σ = 1914249792. Its totient is φ = 177176160.

The previous prime is 641029247. The next prime is 641029289. The reversal of 641029284 is 482920146.

641029284 is a `hidden beast` number, since 641 + 0 + 2 + 9 + 2 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (641029289) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 240849 + ... + 243495.

Almost surely, 2^641029284 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 641029284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957124896).

641029284 is an abundant number, since it is smaller than the sum of its proper divisors (1273220508).

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

641029284 is a wasteful number, since it uses less digits than its factorization.

641029284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726 (or 2690 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 641029284 is about 25318.5561199686. The cubic root of 641029284 is about 862.2356129781.

The spelling of 641029284 in words is "six hundred forty-one million, twenty-nine thousand, two hundred eighty-four".