1318503492 has 18 divisors (see below), whose sum is σ = 3332883918. Its totient is φ = 439501152.

The previous prime is 1318503491. The next prime is 1318503521. The reversal of 1318503492 is 2943058131.

It can be written as a sum of positive squares in only one way, i.e., 828058176 + 490445316 = 28776^2 + 22146^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 36625097 = 1318503492 / (1 + 3 + 1 + 8 + 5 + 0 + 3 + 4 + 9 + 2).

It is not an unprimeable number, because it can be changed into a prime (1318503491) 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 5 ways as a sum of consecutive naturals, for example, 18312513 + ... + 18312584.

Almost surely, 2^1318503492 is an apocalyptic number.

1318503492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1318503492 is an abundant number, since it is smaller than the sum of its proper divisors (2014380426).

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

1318503492 is a wasteful number, since it uses less digits than its factorization.

1318503492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36625107 (or 36625102 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1318503492 is about 36311.2033950956. The cubic root of 1318503492 is about 1096.5466054000.

The spelling of 1318503492 in words is "one billion, three hundred eighteen million, five hundred three thousand, four hundred ninety-two".