78039 has 24 divisors (see below), whose sum is σ = 131040. Its totient is φ = 44352.

The previous prime is 78031. The next prime is 78041. The reversal of 78039 is 93087.

It is a happy number.

It is not a de Polignac number, because 78039 - 2³ = 78031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2677 + ... + 2705.

It is an arithmetic number, because the mean of its divisors is an integer number (5460).

2⁷⁸⁰³⁹ is an apocalyptic number.

78039 is a deficient number, since it is larger than the sum of its proper divisors (53001).

78039 is a wasteful number, since it uses less digits than its factorization.

78039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 78039 is about 279.3546133501. The cubic root of 78039 is about 42.7337067283.

The spelling of 78039 in words is "seventy-eight thousand, thirty-nine".