491571744 has 24 divisors (see below), whose sum is σ = 1290376080. Its totient is φ = 163857216.

The previous prime is 491571737. The next prime is 491571757. The reversal of 491571744 is 447175194.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 491571696 and 491571705.

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, 2560174 + ... + 2560365.

It is an arithmetic number, because the mean of its divisors is an integer number (53765670).

Almost surely, 2^491571744 is an apocalyptic number.

It is an amenable number.

491571744 is an abundant number, since it is smaller than the sum of its proper divisors (798804336).

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

491571744 is a wasteful number, since it uses less digits than its factorization.

491571744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120552 (or 5120544 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 491571744 is about 22171.4172754021. The cubic root of 491571744 is about 789.2155563204.

The spelling of 491571744 in words is "four hundred ninety-one million, five hundred seventy-one thousand, seven hundred forty-four".