641228886 has 24 divisors (see below), whose sum is σ = 1440786984. Its totient is φ = 213742800.

The previous prime is 641228843. The next prime is 641228923. The reversal of 641228886 is 688822146.

It is a super-2 number, since 2×641228886² = 822348968481601992, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 659215 + ... + 660186.

It is an arithmetic number, because the mean of its divisors is an integer number (60032791).

Almost surely, 2^641228886 is an apocalyptic number.

641228886 is an abundant number, since it is smaller than the sum of its proper divisors (799558098).

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

641228886 is a wasteful number, since it uses less digits than its factorization.

641228886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319418 (or 1319406 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 641228886 is about 25322.4976256293. The cubic root of 641228886 is about 862.3250972378.

The spelling of 641228886 in words is "six hundred forty-one million, two hundred twenty-eight thousand, eight hundred eighty-six".