491949312 has 72 divisors (see below), whose sum is σ = 1316908320. Its totient is φ = 163031040.

The previous prime is 491949307. The next prime is 491949317. The reversal of 491949312 is 213949194.

It is an interprime number because it is at equal distance from previous prime (491949307) and next prime (491949317).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491949317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137239 + ... + 140777.

Almost surely, 2^491949312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491949312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658454160).

491949312 is an abundant number, since it is smaller than the sum of its proper divisors (824959008).

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

491949312 is a wasteful number, since it uses less digits than its factorization.

491949312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3739 (or 3725 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 491949312 is about 22179.9303876275. The cubic root of 491949312 is about 789.4175656802.

The spelling of 491949312 in words is "four hundred ninety-one million, nine hundred forty-nine thousand, three hundred twelve".