491992 has 16 divisors (see below), whose sum is σ = 934200. Its totient is φ = 242880.

The previous prime is 491983. The next prime is 492007. The reversal of 491992 is 299194.

It is a super-2 number, since 2×491992² = 484112256128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367 + ... + 1057.

2⁴⁹¹⁹⁹² is an apocalyptic number.

It is an amenable number.

491992 is a deficient number, since it is larger than the sum of its proper divisors (442208).

491992 is a wasteful number, since it uses less digits than its factorization.

491992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 782 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The square root of 491992 is about 701.4214139873. The cubic root of 491992 is about 78.9440398441.

The spelling of 491992 in words is "four hundred ninety-one thousand, nine hundred ninety-two".