491844 has 24 divisors (see below), whose sum is σ = 1215648. Its totient is φ = 154240.

The previous prime is 491837. The next prime is 491851. The reversal of 491844 is 448194.

491844 = T₂₃₂ + T₂₃₃ + ... + T₂₄₈.

It is an interprime number because it is at equal distance from previous prime (491837) and next prime (491851).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002 + ... + 1409.

It is an arithmetic number, because the mean of its divisors is an integer number (50652).

2⁴⁹¹⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

491844 is an abundant number, since it is smaller than the sum of its proper divisors (723804).

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

491844 is a wasteful number, since it uses less digits than its factorization.

491844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435 (or 2433 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 491844 is about 701.3159059939. The cubic root of 491844 is about 78.9361231234.

The spelling of 491844 in words is "four hundred ninety-one thousand, eight hundred forty-four".