78578863 has 8 divisors (see below), whose sum is σ = 86510160. Its totient is φ = 70778880.

The previous prime is 78578809. The next prime is 78578867. The reversal of 78578863 is 36887587.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78578863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78578863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78578867) 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, 31570 + ... + 33967.

It is an arithmetic number, because the mean of its divisors is an integer number (10813770).

Almost surely, 2^78578863 is an apocalyptic number.

78578863 is a deficient number, since it is larger than the sum of its proper divisors (7931297).

78578863 is a wasteful number, since it uses less digits than its factorization.

78578863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65657.

The product of its digits is 2257920, while the sum is 52.

The square root of 78578863 is about 8864.4719526884. The cubic root of 78578863 is about 428.3202232038.

The spelling of 78578863 in words is "seventy-eight million, five hundred seventy-eight thousand, eight hundred sixty-three".