77845842 has 24 divisors (see below), whose sum is σ = 169125840. Its totient is φ = 25877880.

The previous prime is 77845829. The next prime is 77845853. The reversal of 77845842 is 24854877.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1117 + ... + 12527.

It is an arithmetic number, because the mean of its divisors is an integer number (7046910).

Almost surely, 2^77845842 is an apocalyptic number.

77845842 is an abundant number, since it is smaller than the sum of its proper divisors (91279998).

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

77845842 is a wasteful number, since it uses less digits than its factorization.

77845842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11798 (or 11795 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 77845842 is about 8823.0290716964. The cubic root of 77845842 is about 426.9842019651.

It can be divided in two parts, 77845 and 842, that added together give a palindrome (78687).

The spelling of 77845842 in words is "seventy-seven million, eight hundred forty-five thousand, eight hundred forty-two".