810078939 has 12 divisors (see below), whose sum is σ = 1170585936. Its totient is φ = 539834832.

The previous prime is 810078937. The next prime is 810078959. The reversal of 810078939 is 939870018.

It is not a de Polignac number, because 810078939 - 2¹ = 810078937 is a prime.

It is a super-2 number, since 2×810078939² = 1312455774822731442, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 810078894 and 810078903.

It is not an unprimeable number, because it can be changed into a prime (810078937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7282 + ... + 40904.

It is an arithmetic number, because the mean of its divisors is an integer number (97548828).

Almost surely, 2^810078939 is an apocalyptic number.

810078939 is a deficient number, since it is larger than the sum of its proper divisors (360506997).

810078939 is a wasteful number, since it uses less digits than its factorization.

810078939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36306 (or 36303 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 810078939 is about 28461.8857245967. The cubic root of 810078939 is about 932.2000325095.

The spelling of 810078939 in words is "eight hundred ten million, seventy-eight thousand, nine hundred thirty-nine".