78040317 has 8 divisors (see below), whose sum is σ = 104125824. Its totient is φ = 51990848.

The previous prime is 78040309. The next prime is 78040331. The reversal of 78040317 is 71304087.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78040317 - 2³ = 78040309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78040307) 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, 3468 + ... + 12965.

It is an arithmetic number, because the mean of its divisors is an integer number (13015728).

Almost surely, 2^78040317 is an apocalyptic number.

It is an amenable number.

78040317 is a deficient number, since it is larger than the sum of its proper divisors (26085507).

78040317 is a wasteful number, since it uses less digits than its factorization.

78040317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18019.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 78040317 is about 8834.0430721160. The cubic root of 78040317 is about 427.3394712078.

The spelling of 78040317 in words is "seventy-eight million, forty thousand, three hundred seventeen".