1491218352 has 60 divisors (see below), whose sum is σ = 4494372064. Its totient is φ = 458835840.

The previous prime is 1491218321. The next prime is 1491218353. The reversal of 1491218352 is 2538121941.

1491218352 is a `hidden beast` number, since 1 + 4 + 91 + 218 + 352 = 666.

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 (1491218353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396424 + ... + 400167.

Almost surely, 2^1491218352 is an apocalyptic number.

1491218352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1491218352 is an abundant number, since it is smaller than the sum of its proper divisors (3003153712).

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

1491218352 is a wasteful number, since it uses less digits than its factorization.

1491218352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796618 (or 796609 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 1491218352 is about 38616.2964562890. The cubic root of 1491218352 is about 1142.4759850478.

The spelling of 1491218352 in words is "one billion, four hundred ninety-one million, two hundred eighteen thousand, three hundred fifty-two".