1318820480 has 32 divisors (see below), whose sum is σ = 3152806740. Its totient is φ = 527527936.

The previous prime is 1318820479. The next prime is 1318820491. The reversal of 1318820480 is 840288131.

It can be written as a sum of positive squares in 2 ways, for example, as 1317399616 + 1420864 = 36296^2 + 1192^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1318820480.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029689 + ... + 1030968.

Almost surely, 2^1318820480 is an apocalyptic number.

1318820480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1318820480 is an abundant number, since it is smaller than the sum of its proper divisors (1833986260).

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

1318820480 is an equidigital number, since it uses as much as digits as its factorization.

1318820480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060676 (or 2060664 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 1318820480 is about 36315.5680115292. The cubic root of 1318820480 is about 1096.6344737714.

The spelling of 1318820480 in words is "one billion, three hundred eighteen million, eight hundred twenty thousand, four hundred eighty".