491620 has 24 divisors (see below), whose sum is σ = 1056384. Its totient is φ = 192096.

The previous prime is 491611. The next prime is 491627. The reversal of 491620 is 26194.

It is a junction number, because it is equal to n+sod(n) for n = 491591 and 491600.

It is not an unprimeable number, because it can be changed into a prime (491627) by changing a digit.

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, 679 + ... + 1201.

It is an arithmetic number, because the mean of its divisors is an integer number (44016).

2⁴⁹¹⁶²⁰ is an apocalyptic number.

It is an amenable number.

491620 is an abundant number, since it is smaller than the sum of its proper divisors (564764).

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

491620 is a wasteful number, since it uses less digits than its factorization.

491620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 491620 is about 701.1561880209. The cubic root of 491620 is about 78.9241380384.

It can be divided in two parts, 491 and 620, that added together give a palindrome (1111).

The spelling of 491620 in words is "four hundred ninety-one thousand, six hundred twenty".