812840346 has 96 divisors (see below), whose sum is σ = 1986828480. Its totient is φ = 248023296.

The previous prime is 812840299. The next prime is 812840351. The reversal of 812840346 is 643048218.

It is a self number, because there is not a number n which added to its sum of digits gives 812840346.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304365 + ... + 307023.

It is an arithmetic number, because the mean of its divisors is an integer number (20696130).

Almost surely, 2^812840346 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812840346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993414240).

812840346 is an abundant number, since it is smaller than the sum of its proper divisors (1173988134).

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

812840346 is a wasteful number, since it uses less digits than its factorization.

812840346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730 (or 2718 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 812840346 is about 28510.3550661860. The cubic root of 812840346 is about 933.2580628357.

The spelling of 812840346 in words is "eight hundred twelve million, eight hundred forty thousand, three hundred forty-six".