78730 has 8 divisors (see below), whose sum is σ = 141732. Its totient is φ = 31488.

The previous prime is 78721. The next prime is 78737. The reversal of 78730 is 3787.

It can be written as a sum of positive squares in 2 ways, for example, as 68121 + 10609 = 261^2 + 103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 78695 and 78704.

It is not an unprimeable number, because it can be changed into a prime (78737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3927 + ... + 3946.

2⁷⁸⁷³⁰ is an apocalyptic number.

78730 is a deficient number, since it is larger than the sum of its proper divisors (63002).

78730 is a wasteful number, since it uses less digits than its factorization.

78730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7880.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 78730 is about 280.5886669130. The cubic root of 78730 is about 42.8594654826.

It can be divided in two parts, 78 and 730, that added together give a palindrome (808).

The spelling of 78730 in words is "seventy-eight thousand, seven hundred thirty".