1108779728 has 80 divisors (see below), whose sum is σ = 2596500480. Its totient is φ = 448588800.

The previous prime is 1108779709. The next prime is 1108779731. The reversal of 1108779728 is 8279778011.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138458 + ... + 146246.

It is an arithmetic number, because the mean of its divisors is an integer number (32456256).

Almost surely, 2^1108779728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1108779728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1298250240).

1108779728 is an abundant number, since it is smaller than the sum of its proper divisors (1487720752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1108779728 is a wasteful number, since it uses less digits than its factorization.

1108779728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876 (or 7870 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 50.

The square root of 1108779728 is about 33298.3442230991. The cubic root of 1108779728 is about 1035.0192464545.

The spelling of 1108779728 in words is "one billion, one hundred eight million, seven hundred seventy-nine thousand, seven hundred twenty-eight".