810393442 has 8 divisors (see below), whose sum is σ = 1215864000. Its totient is φ = 405105444.

The previous prime is 810393433. The next prime is 810393449. The reversal of 810393442 is 244393018.

810393442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 810393398 and 810393407.

It is not an unprimeable number, because it can be changed into a prime (810393449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33942 + ... + 52657.

It is an arithmetic number, because the mean of its divisors is an integer number (151983000).

Almost surely, 2^810393442 is an apocalyptic number.

810393442 is a deficient number, since it is larger than the sum of its proper divisors (405470558).

810393442 is a wasteful number, since it uses less digits than its factorization.

810393442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91280.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 810393442 is about 28467.4101737408. The cubic root of 810393442 is about 932.3206552290.

The spelling of 810393442 in words is "eight hundred ten million, three hundred ninety-three thousand, four hundred forty-two".