491649746 has 8 divisors (see below), whose sum is σ = 842828160. Its totient is φ = 210707028.

The previous prime is 491649727. The next prime is 491649761. The reversal of 491649746 is 647946194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 491649694 and 491649703.

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, 17558906 + ... + 17558933.

It is an arithmetic number, because the mean of its divisors is an integer number (105353520).

Almost surely, 2^491649746 is an apocalyptic number.

491649746 is a deficient number, since it is larger than the sum of its proper divisors (351178414).

491649746 is a wasteful number, since it uses less digits than its factorization.

491649746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35117848.

The product of its digits is 1306368, while the sum is 50.

The square root of 491649746 is about 22173.1762722439. The cubic root of 491649746 is about 789.2572980307.

The spelling of 491649746 in words is "four hundred ninety-one million, six hundred forty-nine thousand, seven hundred forty-six".