87788818 has 16 divisors (see below), whose sum is σ = 143118360. Its totient is φ = 40144896.

The previous prime is 87788791. The next prime is 87788879. The reversal of 87788818 is 81888778.

It can be written as a sum of positive squares in 4 ways, for example, as 86918329 + 870489 = 9323^2 + 933^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12655 + ... + 18322.

Almost surely, 2^87788818 is an apocalyptic number.

87788818 is a deficient number, since it is larger than the sum of its proper divisors (55329542).

87788818 is a wasteful number, since it uses less digits than its factorization.

87788818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31101.

The product of its digits is 1605632, while the sum is 55.

The square root of 87788818 is about 9369.5687200639. The cubic root of 87788818 is about 444.4399266254.

The spelling of 87788818 in words is "eighty-seven million, seven hundred eighty-eight thousand, eight hundred eighteen".