1318394380 has 24 divisors (see below), whose sum is σ = 2799740160. Its totient is φ = 521431680.

The previous prime is 1318394377. The next prime is 1318394383. The reversal of 1318394380 is 834938131.

It is an interprime number because it is at equal distance from previous prime (1318394377) and next prime (1318394383).

It is not an unprimeable number, because it can be changed into a prime (1318394383) 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 7 ways as a sum of consecutive naturals, for example, 368556 + ... + 372115.

It is an arithmetic number, because the mean of its divisors is an integer number (116655840).

Almost surely, 2^1318394380 is an apocalyptic number.

1318394380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1318394380 is an abundant number, since it is smaller than the sum of its proper divisors (1481345780).

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

1318394380 is a wasteful number, since it uses less digits than its factorization.

1318394380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740769 (or 740767 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1318394380 is about 36309.7009076087. The cubic root of 1318394380 is about 1096.5163565371.

The spelling of 1318394380 in words is "one billion, three hundred eighteen million, three hundred ninety-four thousand, three hundred eighty".