491880 has 32 divisors (see below), whose sum is σ = 1476000. Its totient is φ = 131136.

The previous prime is 491873. The next prime is 491899. The reversal of 491880 is 88194.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

491880 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1930 + ... + 2169.

It is an arithmetic number, because the mean of its divisors is an integer number (46125).

2⁴⁹¹⁸⁸⁰ is an apocalyptic number.

491880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491880 is an abundant number, since it is smaller than the sum of its proper divisors (984120).

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

491880 is a wasteful number, since it uses less digits than its factorization.

491880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113 (or 4109 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 491880 is about 701.3415715612. The cubic root of 491880 is about 78.9380489584.

The spelling of 491880 in words is "four hundred ninety-one thousand, eight hundred eighty".