491659028 has 24 divisors (see below), whose sum is σ = 995769600. Its totient is φ = 208042848.

The previous prime is 491659009. The next prime is 491659031. The reversal of 491659028 is 820956194.

It is a self number, because there is not a number n which added to its sum of digits gives 491659028.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108923 + ... + 113346.

It is an arithmetic number, because the mean of its divisors is an integer number (41490400).

Almost surely, 2^491659028 is an apocalyptic number.

It is an amenable number.

491659028 is an abundant number, since it is smaller than the sum of its proper divisors (504110572).

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

491659028 is a wasteful number, since it uses less digits than its factorization.

491659028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222359 (or 222357 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 491659028 is about 22173.3855782106. The cubic root of 491659028 is about 789.2622648730.

The spelling of 491659028 in words is "four hundred ninety-one million, six hundred fifty-nine thousand, twenty-eight".