810380500 has 48 divisors (see below), whose sum is σ = 1773705024. Its totient is φ = 323450400.

The previous prime is 810380479. The next prime is 810380503. The reversal of 810380500 is 5083018.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810380503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272019 + ... + 274981.

It is an arithmetic number, because the mean of its divisors is an integer number (36952188).

Almost surely, 2^810380500 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 810380500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (886852512).

810380500 is an abundant number, since it is smaller than the sum of its proper divisors (963324524).

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

810380500 is a wasteful number, since it uses less digits than its factorization.

810380500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3529 (or 3517 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 810380500 is about 28467.1828602691. The cubic root of 810380500 is about 932.3156921426.

The spelling of 810380500 in words is "eight hundred ten million, three hundred eighty thousand, five hundred".