78130218 has 16 divisors (see below), whose sum is σ = 163054656. Its totient is φ = 24911040.

The previous prime is 78130201. The next prime is 78130229. The reversal of 78130218 is 81203187.

It is a happy number.

It is a super-2 number, since 2×78130218² = 12208661929455048, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282943 + ... + 283218.

It is an arithmetic number, because the mean of its divisors is an integer number (10190916).

Almost surely, 2^78130218 is an apocalyptic number.

78130218 is an abundant number, since it is smaller than the sum of its proper divisors (84924438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78130218 is a wasteful number, since it uses less digits than its factorization.

78130218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566189.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 78130218 is about 8839.1299345580. The cubic root of 78130218 is about 427.5035039554.

The spelling of 78130218 in words is "seventy-eight million, one hundred thirty thousand, two hundred eighteen".