491520972 has 24 divisors (see below), whose sum is σ = 1162595056. Its totient is φ = 161595648.

The previous prime is 491520941. The next prime is 491520973. The reversal of 491520972 is 279025194.

It is a self number, because there is not a number n which added to its sum of digits gives 491520972.

It is not an unprimeable number, because it can be changed into a prime (491520973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279673 + ... + 281424.

Almost surely, 2^491520972 is an apocalyptic number.

It is an amenable number.

491520972 is an abundant number, since it is smaller than the sum of its proper divisors (671074084).

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

491520972 is a wasteful number, since it uses less digits than its factorization.

491520972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561177 (or 561175 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 491520972 is about 22170.2722581388. The cubic root of 491520972 is about 789.1883840020.

The spelling of 491520972 in words is "four hundred ninety-one million, five hundred twenty thousand, nine hundred seventy-two".