491719536 has 240 divisors, whose sum is σ = 1746221568. Its totient is φ = 125452800.

The previous prime is 491719471. The next prime is 491719541. The reversal of 491719536 is 635917194.

491719536 is a `hidden beast` number, since 49 + 1 + 71 + 9 + 536 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 491719491 and 491719500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 676005 + ... + 676731.

Almost surely, 2^491719536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491719536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873110784).

491719536 is an abundant number, since it is smaller than the sum of its proper divisors (1254502032).

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

491719536 is a wasteful number, since it uses less digits than its factorization.

491719536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 811 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 491719536 is about 22174.7499647685. The cubic root of 491719536 is about 789.2946414588.

It can be divided in two parts, 491 and 719536, that added together give a palindrome (720027).

The spelling of 491719536 in words is "four hundred ninety-one million, seven hundred nineteen thousand, five hundred thirty-six".