1318320 has 60 divisors (see below), whose sum is σ = 4429776. Its totient is φ = 351360.

The previous prime is 1318313. The next prime is 1318349. The reversal of 1318320 is 238131.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1318293 and 1318302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196 + ... + 1635.

2^1318320 is an apocalyptic number.

1318320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1318320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2214888).

1318320 is an abundant number, since it is smaller than the sum of its proper divisors (3111456).

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

1318320 is a wasteful number, since it uses less digits than its factorization.

1318320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850 (or 1841 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1318320 is about 1148.1811703734. The cubic root of 1318320 is about 109.6495735388.

It can be divided in two parts, 13183 and 20, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 1318320 in words is "one million, three hundred eighteen thousand, three hundred twenty".