491022 has 40 divisors (see below), whose sum is σ = 1260336. Its totient is φ = 139968.

The previous prime is 491003. The next prime is 491039. The reversal of 491022 is 220194.

It is a super-2 number, since 2×491022² = 482205208968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 490986 and 491004.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491022.

It is an unprimeable number.

491022 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 19 ways as a sum of consecutive naturals, for example, 918 + ... + 1350.

2⁴⁹¹⁰²² is an apocalyptic number.

491022 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 491022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630168).

491022 is an abundant number, since it is smaller than the sum of its proper divisors (769314).

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

491022 is a wasteful number, since it uses less digits than its factorization.

491022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 491022 is about 700.7296197536. The cubic root of 491022 is about 78.8921242988.

The spelling of 491022 in words is "four hundred ninety-one thousand, twenty-two".