78712 has 8 divisors (see below), whose sum is σ = 147600. Its totient is φ = 39352.

The previous prime is 78707. The next prime is 78713. The reversal of 78712 is 21787.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4912 + ... + 4927.

It is an arithmetic number, because the mean of its divisors is an integer number (18450).

2⁷⁸⁷¹² is an apocalyptic number.

It is an amenable number.

78712 is a deficient number, since it is larger than the sum of its proper divisors (68888).

78712 is a wasteful number, since it uses less digits than its factorization.

78712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9845 (or 9841 counting only the distinct ones).

The product of its digits is 784, while the sum is 25.

The square root of 78712 is about 280.5565896571. The cubic root of 78712 is about 42.8561989210.

Subtracting from 78712 its sum of digits (25), we obtain a palindrome (78687).

The spelling of 78712 in words is "seventy-eight thousand, seven hundred twelve".