818380 has 48 divisors (see below), whose sum is σ = 1905120. Its totient is φ = 293888.

The previous prime is 818371. The next prime is 818383. The reversal of 818380 is 83818.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (818383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9819 + ... + 9901.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2⁸¹⁸³⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (952560).

818380 is an abundant number, since it is smaller than the sum of its proper divisors (1086740).

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

818380 is a wasteful number, since it uses less digits than its factorization.

818380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 818380 is about 904.6435762221. The cubic root of 818380 is about 93.5373372191.

The spelling of 818380 in words is "eight hundred eighteen thousand, three hundred eighty".