816806142 has 24 divisors (see below), whose sum is σ = 1773986760. Its totient is φ = 271616400.

The previous prime is 816806119. The next prime is 816806183. The reversal of 816806142 is 241608618.

It is a junction number, because it is equal to n+sod(n) for n = 816806097 and 816806106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46609 + ... + 61692.

It is an arithmetic number, because the mean of its divisors is an integer number (73916115).

Almost surely, 2^816806142 is an apocalyptic number.

816806142 is an abundant number, since it is smaller than the sum of its proper divisors (957180618).

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

816806142 is a wasteful number, since it uses less digits than its factorization.

816806142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108728 (or 108725 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 816806142 is about 28579.8205382749. The cubic root of 816806142 is about 934.7733699156.

The spelling of 816806142 in words is "eight hundred sixteen million, eight hundred six thousand, one hundred forty-two".