491628 has 24 divisors (see below), whose sum is σ = 1170288. Its totient is φ = 160576.

The previous prime is 491627. The next prime is 491633. The reversal of 491628 is 826194.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 491595 and 491604.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491628.

It is not an unprimeable number, because it can be changed into a prime (491627) 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, 250 + ... + 1022.

It is an arithmetic number, because the mean of its divisors is an integer number (48762).

2⁴⁹¹⁶²⁸ is an apocalyptic number.

It is an amenable number.

491628 is an abundant number, since it is smaller than the sum of its proper divisors (678660).

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

491628 is a wasteful number, since it uses less digits than its factorization.

491628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 831 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 491628 is about 701.1618928607. The cubic root of 491628 is about 78.9245661398.

The spelling of 491628 in words is "four hundred ninety-one thousand, six hundred twenty-eight".