812673378 has 64 divisors (see below), whose sum is σ = 1973514240. Its totient is φ = 245840400.

The previous prime is 812673349. The next prime is 812673397. The reversal of 812673378 is 873376218.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 611751 + ... + 613077.

It is an arithmetic number, because the mean of its divisors is an integer number (30836160).

Almost surely, 2^812673378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812673378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (986757120).

812673378 is an abundant number, since it is smaller than the sum of its proper divisors (1160840862).

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

812673378 is a wasteful number, since it uses less digits than its factorization.

812673378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380 (or 2374 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 812673378 is about 28507.4267165593. The cubic root of 812673378 is about 933.1941573371.

The spelling of 812673378 in words is "eight hundred twelve million, six hundred seventy-three thousand, three hundred seventy-eight".