491707440 has 120 divisors (see below), whose sum is σ = 1887239328. Its totient is φ = 112389120.

The previous prime is 491707429. The next prime is 491707459. The reversal of 491707440 is 44707194.

491707440 is a `hidden beast` number, since 49 + 170 + 7 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 491707395 and 491707404.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43741 + ... + 53820.

Almost surely, 2^491707440 is an apocalyptic number.

491707440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491707440 is an abundant number, since it is smaller than the sum of its proper divisors (1395531888).

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

491707440 is a wasteful number, since it uses less digits than its factorization.

491707440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97587 (or 97578 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 491707440 is about 22174.4772204442. The cubic root of 491707440 is about 789.2881693505.

The spelling of 491707440 in words is "four hundred ninety-one million, seven hundred seven thousand, four hundred forty".