810380 has 12 divisors (see below), whose sum is σ = 1701840. Its totient is φ = 324144.

The previous prime is 810379. The next prime is 810389. The reversal of 810380 is 83018.

810380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 40519 = 810380 / (8 + 1 + 0 + 3 + 8 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20240 + ... + 20279.

It is an arithmetic number, because the mean of its divisors is an integer number (141820).

2⁸¹⁰³⁸⁰ is an apocalyptic number.

It is an amenable number.

810380 is an abundant number, since it is smaller than the sum of its proper divisors (891460).

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

810380 is a wasteful number, since it uses less digits than its factorization.

810380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40528 (or 40526 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 810380 is about 900.2110863570. The cubic root of 810380 is about 93.2315500398.

Adding to 810380 its reverse (83018), we get a palindrome (893398).

The spelling of 810380 in words is "eight hundred ten thousand, three hundred eighty".