812893240 has 16 divisors (see below), whose sum is σ = 1829009880. Its totient is φ = 325157280.

The previous prime is 812893189. The next prime is 812893261. The reversal of 812893240 is 42398218.

It is a self number, because there is not a number n which added to its sum of digits gives 812893240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10161126 + ... + 10161205.

Almost surely, 2^812893240 is an apocalyptic number.

It is an amenable number.

812893240 is an abundant number, since it is smaller than the sum of its proper divisors (1016116640).

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

812893240 is a wasteful number, since it uses less digits than its factorization.

812893240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20322342 (or 20322338 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 812893240 is about 28511.2826789676. The cubic root of 812893240 is about 933.2783057127.

The spelling of 812893240 in words is "eight hundred twelve million, eight hundred ninety-three thousand, two hundred forty".