78130930 has 32 divisors (see below), whose sum is σ = 146059200. Its totient is φ = 30055872.

The previous prime is 78130891. The next prime is 78130933. The reversal of 78130930 is 3903187.

It is a super-2 number, since 2×78130930² = 12208884445329800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78130892 and 78130901.

It is not an unprimeable number, because it can be changed into a prime (78130933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121189 + ... + 121831.

It is an arithmetic number, because the mean of its divisors is an integer number (4564350).

Almost surely, 2^78130930 is an apocalyptic number.

78130930 is a deficient number, since it is larger than the sum of its proper divisors (67928270).

78130930 is a wasteful number, since it uses less digits than its factorization.

78130930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 78130930 is about 8839.1702099236. The cubic root of 78130930 is about 427.5048025634.

The spelling of 78130930 in words is "seventy-eight million, one hundred thirty thousand, nine hundred thirty".