491688412 has 12 divisors (see below), whose sum is σ = 883710520. Its totient is φ = 239199696.

The previous prime is 491688409. The next prime is 491688499. The reversal of 491688412 is 214886194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1660962 + ... + 1661257.

Almost surely, 2^491688412 is an apocalyptic number.

It is an amenable number.

491688412 is a deficient number, since it is larger than the sum of its proper divisors (392022108).

491688412 is a wasteful number, since it uses less digits than its factorization.

491688412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322260 (or 3322258 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 491688412 is about 22174.0481644647. The cubic root of 491688412 is about 789.2779879785.

The spelling of 491688412 in words is "four hundred ninety-one million, six hundred eighty-eight thousand, four hundred twelve".