491407722 has 144 divisors (see below), whose sum is σ = 1240581888. Its totient is φ = 145566720.

The previous prime is 491407717. The next prime is 491407769. The reversal of 491407722 is 227704194.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2546058 + ... + 2546250.

It is an arithmetic number, because the mean of its divisors is an integer number (8615152).

Almost surely, 2^491407722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491407722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620290944).

491407722 is an abundant number, since it is smaller than the sum of its proper divisors (749174166).

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

491407722 is a wasteful number, since it uses less digits than its factorization.

491407722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 491407722 is about 22167.7180151679. The cubic root of 491407722 is about 789.1277677688.

The spelling of 491407722 in words is "four hundred ninety-one million, four hundred seven thousand, seven hundred twenty-two".