78855887 has 8 divisors (see below), whose sum is σ = 86088960. Its totient is φ = 71633560.

The previous prime is 78855883. The next prime is 78855913.

It is a happy number.

78855887 is nontrivially palindromic in base 10.

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 78855887 - 2² = 78855883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78855883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26564 + ... + 29382.

It is an arithmetic number, because the mean of its divisors is an integer number (10761120).

Almost surely, 2^78855887 is an apocalyptic number.

78855887 is a deficient number, since it is larger than the sum of its proper divisors (7233073).

78855887 is a wasteful number, since it uses less digits than its factorization.

78855887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373.

The product of its digits is 5017600, while the sum is 56.

The square root of 78855887 is about 8880.0837270828. The cubic root of 78855887 is about 428.8229700111.

The spelling of 78855887 in words is "seventy-eight million, eight hundred fifty-five thousand, eight hundred eighty-seven".