812916000 has 480 divisors, whose sum is σ = 3229834608. Its totient is φ = 199065600.

The previous prime is 812915993. The next prime is 812916017. The reversal of 812916000 is 619218.

It can be written as a sum of positive squares in 8 ways, for example, as 18352656 + 794563344 = 4284^2 + 28188^2 .

It is a tau number, because it is divible by the number of its divisors (480).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 4211904 + ... + 4212096.

Almost surely, 2^812916000 is an apocalyptic number.

812916000 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 812916000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1614917304).

812916000 is an abundant number, since it is smaller than the sum of its proper divisors (2416918608).

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

812916000 is a wasteful number, since it uses less digits than its factorization.

812916000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 812916000 is about 28511.6818164064. The cubic root of 812916000 is about 933.2870158421.

The spelling of 812916000 in words is "eight hundred twelve million, nine hundred sixteen thousand".