491870 has 16 divisors (see below), whose sum is σ = 895968. Its totient is φ = 194400.

The previous prime is 491867. The next prime is 491873. The reversal of 491870 is 78194.

It is an interprime number because it is at equal distance from previous prime (491867) and next prime (491873).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 767 + ... + 1253.

It is an arithmetic number, because the mean of its divisors is an integer number (55998).

2⁴⁹¹⁸⁷⁰ is an apocalyptic number.

491870 is a deficient number, since it is larger than the sum of its proper divisors (404098).

491870 is a wasteful number, since it uses less digits than its factorization.

491870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 491870 is about 701.3344423312. The cubic root of 491870 is about 78.9375140137.

The spelling of 491870 in words is "four hundred ninety-one thousand, eight hundred seventy".