78930 has 24 divisors (see below), whose sum is σ = 205452. Its totient is φ = 21024.

The previous prime is 78929. The next prime is 78941. The reversal of 78930 is 3987.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77841 + 1089 = 279^2 + 33^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78894 and 78903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349 + ... + 528.

2⁷⁸⁹³⁰ is an apocalyptic number.

78930 is an abundant number, since it is smaller than the sum of its proper divisors (126522).

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 (102726).

78930 is a wasteful number, since it uses less digits than its factorization.

78930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 887 counting only the distinct ones).

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

The square root of 78930 is about 280.9448344426. The cubic root of 78930 is about 42.8957271569.

The spelling of 78930 in words is "seventy-eight thousand, nine hundred thirty".