491520312 has 40 divisors (see below), whose sum is σ = 1376713800. Its totient is φ = 163839888.

The previous prime is 491520301. The next prime is 491520317. The reversal of 491520312 is 213025194.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491520317) 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 9 ways as a sum of consecutive naturals, for example, 378612 + ... + 379907.

It is an arithmetic number, because the mean of its divisors is an integer number (34417845).

Almost surely, 2^491520312 is an apocalyptic number.

It is an amenable number.

491520312 is an abundant number, since it is smaller than the sum of its proper divisors (885193488).

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

491520312 is a wasteful number, since it uses less digits than its factorization.

491520312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758537 (or 758524 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 491520312 is about 22170.2573733369. The cubic root of 491520312 is about 789.1880307688.

The spelling of 491520312 in words is "four hundred ninety-one million, five hundred twenty thousand, three hundred twelve".