78942 has 16 divisors (see below), whose sum is σ = 161280. Its totient is φ = 25752.

The previous prime is 78941. The next prime is 78977. The reversal of 78942 is 24987.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 78942.

It is not an unprimeable number, because it can be changed into a prime (78941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243 + ... + 465.

It is an arithmetic number, because the mean of its divisors is an integer number (10080).

2⁷⁸⁹⁴² is an apocalyptic number.

78942 is an abundant number, since it is smaller than the sum of its proper divisors (82338).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80640).

78942 is a wasteful number, since it uses less digits than its factorization.

78942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287.

The product of its digits is 4032, while the sum is 30.

The square root of 78942 is about 280.9661901368. The cubic root of 78942 is about 42.8979009085.

The spelling of 78942 in words is "seventy-eight thousand, nine hundred forty-two".