1318788864 has 90 divisors (see below), whose sum is σ = 3932451600. Its totient is φ = 439589376.

The previous prime is 1318788859. The next prime is 1318788869. The reversal of 1318788864 is 4688878131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1318788859) and next prime (1318788869).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1318788864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318788869) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11064 + ... + 52535.

Almost surely, 2^1318788864 is an apocalyptic number.

It is an amenable number.

1318788864 is an abundant number, since it is smaller than the sum of its proper divisors (2613662736).

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

1318788864 is an frugal number, since it uses more digits than its factorization.

1318788864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63627 (or 63604 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 1318788864 is about 36315.1327135121. The cubic root of 1318788864 is about 1096.6257105184.

The spelling of 1318788864 in words is "one billion, three hundred eighteen million, seven hundred eighty-eight thousand, eight hundred sixty-four".