810734400 has 504 divisors, whose sum is σ = 3446922240. Its totient is φ = 184826880.

The previous prime is 810734387. The next prime is 810734401. The reversal of 810734400 is 4437018.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810734401) 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 71 ways as a sum of consecutive naturals, for example, 2116609 + ... + 2116991.

Almost surely, 2^810734400 is an apocalyptic number.

810734400 is a gapful number since it is divisible by the number (80) 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 810734400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723461120).

810734400 is an abundant number, since it is smaller than the sum of its proper divisors (2636187840).

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

810734400 is a wasteful number, since it uses less digits than its factorization.

810734400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 810734400 is about 28473.3981112195. The cubic root of 810734400 is about 932.4513891001.

The spelling of 810734400 in words is "eight hundred ten million, seven hundred thirty-four thousand, four hundred".