816373800 has 144 divisors (see below), whose sum is σ = 2990969280. Its totient is φ = 197904000.

The previous prime is 816373793. The next prime is 816373861. The reversal of 816373800 is 8373618.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 816 + ... + 40415.

It is an arithmetic number, because the mean of its divisors is an integer number (20770620).

Almost surely, 2^816373800 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 816373800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1495484640).

816373800 is an abundant number, since it is smaller than the sum of its proper divisors (2174595480).

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

816373800 is a wasteful number, since it uses less digits than its factorization.

816373800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41264 (or 41252 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 816373800 is about 28572.2557737397. The cubic root of 816373800 is about 934.6084131433.

The spelling of 816373800 in words is "eight hundred sixteen million, three hundred seventy-three thousand, eight hundred".