108778869 has 40 divisors (see below), whose sum is σ = 173360088. Its totient is φ = 67737600.

The previous prime is 108778861. The next prime is 108778871. The reversal of 108778869 is 968877801.

It can be written as a sum of positive squares in 4 ways, for example, as 94828644 + 13950225 = 9738^2 + 3735^2 .

It is not a de Polignac number, because 108778869 - 2³ = 108778861 is a prime.

It is a super-2 number, since 2×108778869² = 23665684681838322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108778861) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 271069 + ... + 271469.

Almost surely, 2^108778869 is an apocalyptic number.

It is an amenable number.

108778869 is a deficient number, since it is larger than the sum of its proper divisors (64581219).

108778869 is a wasteful number, since it uses less digits than its factorization.

108778869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 54.

The square root of 108778869 is about 10429.7108780637. The cubic root of 108778869 is about 477.3623685280.

The spelling of 108778869 in words is "one hundred eight million, seven hundred seventy-eight thousand, eight hundred sixty-nine".