641224260 has 72 divisors (see below), whose sum is σ = 1950661440. Its totient is φ = 170499648.

The previous prime is 641224247. The next prime is 641224261. The reversal of 641224260 is 62422146.

641224260 is a `hidden beast` number, since 6 + 412 + 242 + 6 + 0 = 666.

It is a super-2 number, since 2×641224260² = 822337103225095200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641224261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59659 + ... + 69581.

It is an arithmetic number, because the mean of its divisors is an integer number (27092520).

Almost surely, 2^641224260 is an apocalyptic number.

641224260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641224260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975330720).

641224260 is an abundant number, since it is smaller than the sum of its proper divisors (1309437180).

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

641224260 is a wasteful number, since it uses less digits than its factorization.

641224260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10297 (or 10292 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 641224260 is about 25322.4062837638. The cubic root of 641224260 is about 862.3230235500.

The spelling of 641224260 in words is "six hundred forty-one million, two hundred twenty-four thousand, two hundred sixty".