78130 has 16 divisors (see below), whose sum is σ = 151704. Its totient is φ = 28800.

The previous prime is 78121. The next prime is 78137. The reversal of 78130 is 3187.

It can be written as a sum of positive squares in 4 ways, for example, as 62001 + 16129 = 249^2 + 127^2 .

It is a super-2 number, since 2×78130² = 12208593800, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 78098 and 78107.

It is not an unprimeable number, because it can be changed into a prime (78137) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 171 + ... + 430.

2⁷⁸¹³⁰ is an apocalyptic number.

78130 is a deficient number, since it is larger than the sum of its proper divisors (73574).

78130 is a wasteful number, since it uses less digits than its factorization.

78130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 78130 is about 279.5174413163. The cubic root of 78130 is about 42.7503106346.

The spelling of 78130 in words is "seventy-eight thousand, one hundred thirty".