1318287648 has 48 divisors (see below), whose sum is σ = 3572142336. Its totient is φ = 425253120.

The previous prime is 1318287643. The next prime is 1318287683. The reversal of 1318287648 is 8467828131.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1318287597 and 1318287606.

It is not an unprimeable number, because it can be changed into a prime (1318287643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218511 + ... + 224462.

It is an arithmetic number, because the mean of its divisors is an integer number (74419632).

Almost surely, 2^1318287648 is an apocalyptic number.

It is an amenable number.

1318287648 is an abundant number, since it is smaller than the sum of its proper divisors (2253854688).

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

1318287648 is a wasteful number, since it uses less digits than its factorization.

1318287648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443017 (or 443009 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 1318287648 is about 36308.2311328988. The cubic root of 1318287648 is about 1096.4867658613.

The spelling of 1318287648 in words is "one billion, three hundred eighteen million, two hundred eighty-seven thousand, six hundred forty-eight".