491023312 has 40 divisors (see below), whose sum is σ = 1035143816. Its totient is φ = 224280576.

The previous prime is 491023303. The next prime is 491023333. The reversal of 491023312 is 213320194.

It can be written as a sum of positive squares in 4 ways, for example, as 137733696 + 353289616 = 11736^2 + 18796^2 .

It is a super-2 number, since 2×491023312² = 482207785854898688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8008 + ... + 32344.

Almost surely, 2^491023312 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 491023312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517571908).

491023312 is an abundant number, since it is smaller than the sum of its proper divisors (544120504).

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

491023312 is a wasteful number, since it uses less digits than its factorization.

491023312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24455 (or 24449 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 491023312 is about 22159.0458278329. The cubic root of 491023312 is about 788.9219456477.

The spelling of 491023312 in words is "four hundred ninety-one million, twenty-three thousand, three hundred twelve".