78942012 has 24 divisors (see below), whose sum is σ = 184415616. Its totient is φ = 26282928.

The previous prime is 78942011. The next prime is 78942091. The reversal of 78942012 is 21024987.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78942011) 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, 8203 + ... + 15005.

It is an arithmetic number, because the mean of its divisors is an integer number (7683984).

Almost surely, 2^78942012 is an apocalyptic number.

It is an amenable number.

78942012 is an abundant number, since it is smaller than the sum of its proper divisors (105473604).

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

78942012 is a wasteful number, since it uses less digits than its factorization.

78942012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7777 (or 7775 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 78942012 is about 8884.9317386235. The cubic root of 78942012 is about 428.9790308212.

Adding to 78942012 its reverse (21024987), we get a palindrome (99966999).

The spelling of 78942012 in words is "seventy-eight million, nine hundred forty-two thousand, twelve".