641880 has 48 divisors (see below), whose sum is σ = 2087280. Its totient is φ = 171072.

The previous prime is 641873. The next prime is 641881. The reversal of 641880 is 88146.

641880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 532 + ... + 1251.

It is an arithmetic number, because the mean of its divisors is an integer number (43485).

2⁶⁴¹⁸⁸⁰ is an apocalyptic number.

641880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641880 is an abundant number, since it is smaller than the sum of its proper divisors (1445400).

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

641880 is a wasteful number, since it uses less digits than its factorization.

641880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800 (or 1793 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 641880 is about 801.1741383744. The cubic root of 641880 is about 86.2616871371.

It can be divided in two parts, 641 and 880, that added together give a square (1521 = 39²).

The spelling of 641880 in words is "six hundred forty-one thousand, eight hundred eighty".