491446172 has 48 divisors (see below), whose sum is σ = 1059905280. Its totient is φ = 194659200.

The previous prime is 491446171. The next prime is 491446177. The reversal of 491446172 is 271644194.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491446171) 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, 10547 + ... + 33077.

It is an arithmetic number, because the mean of its divisors is an integer number (22081360).

Almost surely, 2^491446172 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 491446172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529952640).

491446172 is an abundant number, since it is smaller than the sum of its proper divisors (568459108).

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

491446172 is a wasteful number, since it uses less digits than its factorization.

491446172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22602 (or 22600 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 491446172 is about 22168.5852503041. The cubic root of 491446172 is about 789.1483488938.

The spelling of 491446172 in words is "four hundred ninety-one million, four hundred forty-six thousand, one hundred seventy-two".