78841656 has 24 divisors (see below), whose sum is σ = 213529680. Its totient is φ = 26280528.

The previous prime is 78841643. The next prime is 78841657. The reversal of 78841656 is 65614887.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78841657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 547440 + ... + 547583.

It is an arithmetic number, because the mean of its divisors is an integer number (8897070).

Almost surely, 2^78841656 is an apocalyptic number.

It is an amenable number.

78841656 is an abundant number, since it is smaller than the sum of its proper divisors (134688024).

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

78841656 is a wasteful number, since it uses less digits than its factorization.

78841656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095035 (or 1095028 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 78841656 is about 8879.2824034378. The cubic root of 78841656 is about 428.7971721197.

It can be divided in two parts, 78841 and 656, that added together give a palindrome (79497).

The spelling of 78841656 in words is "seventy-eight million, eight hundred forty-one thousand, six hundred fifty-six".