491644746 has 12 divisors (see below), whose sum is σ = 1065230322. Its totient is φ = 163881576.

The previous prime is 491644739. The next prime is 491644753. The reversal of 491644746 is 647446194.

It is an interprime number because it is at equal distance from previous prime (491644739) and next prime (491644753).

It can be written as a sum of positive squares in only one way, i.e., 267813225 + 223831521 = 16365^2 + 14961^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13656781 + ... + 13656816.

Almost surely, 2^491644746 is an apocalyptic number.

491644746 is an abundant number, since it is smaller than the sum of its proper divisors (573585576).

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

491644746 is a wasteful number, since it uses less digits than its factorization.

491644746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27313605 (or 27313602 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 491644746 is about 22173.0635231129. The cubic root of 491644746 is about 789.2546224811.

The spelling of 491644746 in words is "four hundred ninety-one million, six hundred forty-four thousand, seven hundred forty-six".