812723442 has 32 divisors (see below), whose sum is σ = 1717873920. Its totient is φ = 255618000.

The previous prime is 812723413. The next prime is 812723447. The reversal of 812723442 is 244327218.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (812723447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14413 + ... + 42815.

It is an arithmetic number, because the mean of its divisors is an integer number (53683560).

Almost surely, 2^812723442 is an apocalyptic number.

812723442 is an abundant number, since it is smaller than the sum of its proper divisors (905150478).

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

812723442 is a wasteful number, since it uses less digits than its factorization.

812723442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28678.

The product of its digits is 21504, while the sum is 33.

The square root of 812723442 is about 28508.3047900081. The cubic root of 812723442 is about 933.2133198010.

The spelling of 812723442 in words is "eight hundred twelve million, seven hundred twenty-three thousand, four hundred forty-two".