788888861 has 4 divisors (see below), whose sum is σ = 789627900. Its totient is φ = 788149824.

The previous prime is 788888857. The next prime is 788888897. The reversal of 788888861 is 168888887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168888887 = 7789 ⋅21683.

It can be written as a sum of positive squares in 2 ways, for example, as 397244761 + 391644100 = 19931^2 + 19790^2 .

It is a cyclic number.

It is not a de Polignac number, because 788888861 - 2² = 788888857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 788888794 and 788888803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (788888161) 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 3 ways as a sum of consecutive naturals, for example, 367916 + ... + 370053.

It is an arithmetic number, because the mean of its divisors is an integer number (197406975).

Almost surely, 2^788888861 is an apocalyptic number.

It is an amenable number.

788888861 is a deficient number, since it is larger than the sum of its proper divisors (739039).

788888861 is a wasteful number, since it uses less digits than its factorization.

788888861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739038.

The product of its digits is 11010048, while the sum is 62.

The square root of 788888861 is about 28087.1654141175. The cubic root of 788888861 is about 923.9999363611. Note that the first 4 decimals are identical.

It can be divided in two parts, 78888886 and 1, that added together give a palindrome (78888887).

The spelling of 788888861 in words is "seven hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-one".