491028912 has 160 divisors (see below), whose sum is σ = 1548472320. Its totient is φ = 147744000.

The previous prime is 491028893. The next prime is 491028917. The reversal of 491028912 is 219820194.

It is a super-2 number, since 2×491028912² = 482218784839807488, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (491028917) 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 31 ways as a sum of consecutive naturals, for example, 907362 + ... + 907902.

It is an arithmetic number, because the mean of its divisors is an integer number (9677952).

Almost surely, 2^491028912 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 491028912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774236160).

491028912 is an abundant number, since it is smaller than the sum of its proper divisors (1057443408).

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

491028912 is a wasteful number, since it uses less digits than its factorization.

491028912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 491028912 is about 22159.1721867041. The cubic root of 491028912 is about 788.9249447898.

The spelling of 491028912 in words is "four hundred ninety-one million, twenty-eight thousand, nine hundred twelve".