78862217 has 16 divisors (see below), whose sum is σ = 96816000. Its totient is φ = 64033200.

The previous prime is 78862169. The next prime is 78862219. The reversal of 78862217 is 71226887.

It is not a de Polignac number, because 78862217 - 2⁸ = 78861961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78862219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467 + ... + 12567.

It is an arithmetic number, because the mean of its divisors is an integer number (6051000).

Almost surely, 2^78862217 is an apocalyptic number.

It is an amenable number.

78862217 is a deficient number, since it is larger than the sum of its proper divisors (17953783).

78862217 is a wasteful number, since it uses less digits than its factorization.

78862217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12141 (or 12127 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 78862217 is about 8880.4401354888. The cubic root of 78862217 is about 428.8344440087.

The spelling of 78862217 in words is "seventy-eight million, eight hundred sixty-two thousand, two hundred seventeen".