78844887 has 16 divisors (see below), whose sum is σ = 127426560. Its totient is φ = 47784600.

The previous prime is 78844859. The next prime is 78844901.

It is a happy number.

78844887 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78844887 - 2⁸ = 78844631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78844807) 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, 132439 + ... + 133032.

It is an arithmetic number, because the mean of its divisors is an integer number (7964160).

Almost surely, 2^78844887 is an apocalyptic number.

78844887 is a deficient number, since it is larger than the sum of its proper divisors (48581673).

78844887 is a wasteful number, since it uses less digits than its factorization.

78844887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265491 (or 265485 counting only the distinct ones).

The product of its digits is 3211264, while the sum is 54.

The square root of 78844887 is about 8879.4643419522. The cubic root of 78844887 is about 428.8030295341.

The spelling of 78844887 in words is "seventy-eight million, eight hundred forty-four thousand, eight hundred eighty-seven".