78822887 has 32 divisors (see below), whose sum is σ = 99160320. Its totient is φ = 61585920.

The previous prime is 78822883. The next prime is 78822907.

It is a happy number.

78822887 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78822887 - 2² = 78822883 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 (78822881) 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 31 ways as a sum of consecutive naturals, for example, 181823 + ... + 182255.

It is an arithmetic number, because the mean of its divisors is an integer number (3098760).

Almost surely, 2^78822887 is an apocalyptic number.

78822887 is a deficient number, since it is larger than the sum of its proper divisors (20337433).

78822887 is a wasteful number, since it uses less digits than its factorization.

78822887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543.

The product of its digits is 802816, while the sum is 50.

The square root of 78822887 is about 8878.2254420577. The cubic root of 78822887 is about 428.7631430152.

The spelling of 78822887 in words is "seventy-eight million, eight hundred twenty-two thousand, eight hundred eighty-seven".