641132280 has 64 divisors (see below), whose sum is σ = 2137111200. Its totient is φ = 170968320.

The previous prime is 641132251. The next prime is 641132299. The reversal of 641132280 is 82231146.

641132280 is a `hidden beast` number, since 641 + 13 + 2 + 2 + 8 + 0 = 666.

It is a super-2 number, since 2×641132280² = 822101200915996800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295741 + ... + 297900.

Almost surely, 2^641132280 is an apocalyptic number.

641132280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641132280 is an abundant number, since it is smaller than the sum of its proper divisors (1495978920).

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

641132280 is a wasteful number, since it uses less digits than its factorization.

641132280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593661 (or 593651 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 641132280 is about 25320.5900405184. The cubic root of 641132280 is about 862.2817897886.

The spelling of 641132280 in words is "six hundred forty-one million, one hundred thirty-two thousand, two hundred eighty".