812038540 has 24 divisors (see below), whose sum is σ = 1716149232. Its totient is φ = 322745280.

The previous prime is 812038523. The next prime is 812038547. The reversal of 812038540 is 45830218.

It is not an unprimeable number, because it can be changed into a prime (812038547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126166 + ... + 132445.

It is an arithmetic number, because the mean of its divisors is an integer number (71506218).

Almost surely, 2^812038540 is an apocalyptic number.

It is an amenable number.

812038540 is an abundant number, since it is smaller than the sum of its proper divisors (904110692).

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

812038540 is a wasteful number, since it uses less digits than its factorization.

812038540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258777 (or 258775 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 812038540 is about 28496.2899339546. The cubic root of 812038540 is about 932.9510988677.

Adding to 812038540 its reverse (45830218), we get a palindrome (857868758).

The spelling of 812038540 in words is "eight hundred twelve million, thirty-eight thousand, five hundred forty".