1361808 has 90 divisors (see below), whose sum is σ = 4456374. Its totient is φ = 387072.

The previous prime is 1361803. The next prime is 1361809. The reversal of 1361808 is 8081631.

It can be written as a sum of positive squares in only one way, i.e., 1016064 + 345744 = 1008^2 + 588^2 .

It is not an unprimeable number, because it can be changed into a prime (1361803) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6960 + ... + 7152.

2^1361808 is an apocalyptic number.

1361808 is a gapful number since it is divisible by the number (18) 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 1361808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2228187).

1361808 is an abundant number, since it is smaller than the sum of its proper divisors (3094566).

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

1361808 is a wasteful number, since it uses less digits than its factorization.

1361808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 205 counting only the distinct ones).

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

The square root of 1361808 is about 1166.9652951138. The cubic root of 1361808 is about 110.8422399737.

The spelling of 1361808 in words is "one million, three hundred sixty-one thousand, eight hundred eight".