78117206 has 16 divisors (see below), whose sum is σ = 118236240. Its totient is φ = 38707200.

The previous prime is 78117199. The next prime is 78117209. The reversal of 78117206 is 60271187.

It is a super-3 number, since 3×78117206³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78117209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194606 + ... + 195006.

It is an arithmetic number, because the mean of its divisors is an integer number (7389765).

Almost surely, 2^78117206 is an apocalyptic number.

78117206 is a deficient number, since it is larger than the sum of its proper divisors (40119034).

78117206 is a wasteful number, since it uses less digits than its factorization.

78117206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 78117206 is about 8838.3938586148. The cubic root of 78117206 is about 427.4797701404.

The spelling of 78117206 in words is "seventy-eight million, one hundred seventeen thousand, two hundred six".