491626 has 8 divisors (see below), whose sum is σ = 740484. Its totient is φ = 244800.

The previous prime is 491611. The next prime is 491627. The reversal of 491626 is 626194.

It can be written as a sum of positive squares in 2 ways, for example, as 491401 + 225 = 701^2 + 15^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×491626² = 483392247752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 491594 and 491603.

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

491626 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 3 ways as a sum of consecutive naturals, for example, 496 + ... + 1108.

2⁴⁹¹⁶²⁶ is an apocalyptic number.

491626 is a deficient number, since it is larger than the sum of its proper divisors (248858).

491626 is a wasteful number, since it uses less digits than its factorization.

491626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016.

The product of its digits is 2592, while the sum is 28.

The square root of 491626 is about 701.1604666551. The cubic root of 491626 is about 78.9244591149.

The spelling of 491626 in words is "four hundred ninety-one thousand, six hundred twenty-six".