491712560 has 20 divisors (see below), whose sum is σ = 1143231888. Its totient is φ = 196684992.

The previous prime is 491712517. The next prime is 491712563. The reversal of 491712560 is 65217194.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 491712560.

It is not an unprimeable number, because it can be changed into a prime (491712563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3073124 + ... + 3073283.

Almost surely, 2^491712560 is an apocalyptic number.

491712560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491712560 is an abundant number, since it is smaller than the sum of its proper divisors (651519328).

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

491712560 is a wasteful number, since it uses less digits than its factorization.

491712560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6146420 (or 6146414 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 491712560 is about 22174.5926681867. The cubic root of 491712560 is about 789.2909088802.

The spelling of 491712560 in words is "four hundred ninety-one million, seven hundred twelve thousand, five hundred sixty".