1318649472 has 192 divisors, whose sum is σ = 4592203200. Its totient is φ = 354557952.

The previous prime is 1318649447. The next prime is 1318649473. The reversal of 1318649472 is 2749468131.

1318649472 is a `hidden beast` number, since 13 + 1 + 86 + 494 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1318649473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132279 + ... + 141897.

It is an arithmetic number, because the mean of its divisors is an integer number (23917725).

Almost surely, 2^1318649472 is an apocalyptic number.

1318649472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1318649472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2296101600).

1318649472 is an abundant number, since it is smaller than the sum of its proper divisors (3273553728).

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

1318649472 is a wasteful number, since it uses less digits than its factorization.

1318649472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9663 (or 9648 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1318649472 is about 36313.2134628705. The cubic root of 1318649472 is about 1096.5870724818.

The spelling of 1318649472 in words is "one billion, three hundred eighteen million, six hundred forty-nine thousand, four hundred seventy-two".