491271004 has 12 divisors (see below), whose sum is σ = 982542064. Its totient is φ = 210544704.

The previous prime is 491270987. The next prime is 491271013. The reversal of 491271004 is 400172194.

491271004 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 17545393 = 491271004 / (4 + 9 + 1 + 2 + 7 + 1 + 0 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8772669 + ... + 8772724.

Almost surely, 2^491271004 is an apocalyptic number.

It is an amenable number.

491271004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

491271004 is a wasteful number, since it uses less digits than its factorization.

491271004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17545404 (or 17545402 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 491271004 is about 22164.6340822491. The cubic root of 491271004 is about 789.0545780512.

The spelling of 491271004 in words is "four hundred ninety-one million, two hundred seventy-one thousand, four".