491271872 has 112 divisors (see below), whose sum is σ = 1218712320. Its totient is φ = 191296512.

The previous prime is 491271853. The next prime is 491271883. The reversal of 491271872 is 278172194.

It is a tau number, because it is divible by the number of its divisors (112).

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, 389579 + ... + 390837.

It is an arithmetic number, because the mean of its divisors is an integer number (10881360).

Almost surely, 2^491271872 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 491271872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (609356160).

491271872 is an abundant number, since it is smaller than the sum of its proper divisors (727440448).

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

491271872 is a wasteful number, since it uses less digits than its factorization.

491271872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358 (or 1348 counting only the distinct ones).

The product of its digits is 56448, while the sum is 41.

The square root of 491271872 is about 22164.6536629833. The cubic root of 491271872 is about 789.0550427635.

The spelling of 491271872 in words is "four hundred ninety-one million, two hundred seventy-one thousand, eight hundred seventy-two".