491079768 has 64 divisors (see below), whose sum is σ = 1271570400. Its totient is φ = 157946880.

The previous prime is 491079767. The next prime is 491079781. The reversal of 491079768 is 867970194.

It is a self number, because there is not a number n which added to its sum of digits gives 491079768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491079767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74428 + ... + 80756.

Almost surely, 2^491079768 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 491079768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635785200).

491079768 is an abundant number, since it is smaller than the sum of its proper divisors (780490632).

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

491079768 is a wasteful number, since it uses less digits than its factorization.

491079768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452 (or 6448 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 491079768 is about 22160.3196727845. The cubic root of 491079768 is about 788.9521802410.

The spelling of 491079768 in words is "four hundred ninety-one million, seventy-nine thousand, seven hundred sixty-eight".