491440176 has 80 divisors (see below), whose sum is σ = 1431753600. Its totient is φ = 161358912.

The previous prime is 491440151. The next prime is 491440189. The reversal of 491440176 is 671044194.

491440176 is a `hidden beast` number, since 49 + 1 + 440 + 176 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 491440176.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20455 + ... + 37433.

It is an arithmetic number, because the mean of its divisors is an integer number (17896920).

Almost surely, 2^491440176 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 491440176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715876800).

491440176 is an abundant number, since it is smaller than the sum of its proper divisors (940313424).

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

491440176 is a wasteful number, since it uses less digits than its factorization.

491440176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17063 (or 17051 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 491440176 is about 22168.4500134764. The cubic root of 491440176 is about 789.1451394866.

The spelling of 491440176 in words is "four hundred ninety-one million, four hundred forty thousand, one hundred seventy-six".