1308816 has 60 divisors (see below), whose sum is σ = 3747900. Its totient is φ = 426240.

The previous prime is 1308803. The next prime is 1308829. The reversal of 1308816 is 6188031.

It is an interprime number because it is at equal distance from previous prime (1308803) and next prime (1308829).

It can be written as a sum of positive squares in 2 ways, for example, as 90000 + 1218816 = 300^2 + 1104^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1308816.

It is a congruent number.

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, 8710 + ... + 8858.

It is an arithmetic number, because the mean of its divisors is an integer number (62465).

2^1308816 is an apocalyptic number.

1308816 is a gapful number since it is divisible by the number (16) 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 1308816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1873950).

1308816 is an abundant number, since it is smaller than the sum of its proper divisors (2439084).

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

1308816 is a wasteful number, since it uses less digits than its factorization.

1308816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1308816 is about 1144.0349645006. The cubic root of 1308816 is about 109.3854434654.

The spelling of 1308816 in words is "one million, three hundred eight thousand, eight hundred sixteen".