1100978856 has 24 divisors (see below), whose sum is σ = 2981817930. Its totient is φ = 366992928.

The previous prime is 1100978849. The next prime is 1100978867. The reversal of 1100978856 is 6588790011.

It can be written as a sum of positive squares in only one way, i.e., 1098922500 + 2056356 = 33150^2 + 1434^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7645615 + ... + 7645758.

Almost surely, 2^1100978856 is an apocalyptic number.

It is an amenable number.

1100978856 is an abundant number, since it is smaller than the sum of its proper divisors (1880839074).

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

1100978856 is a wasteful number, since it uses less digits than its factorization.

1100978856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15291385 (or 15291378 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 1100978856 is about 33181.0014315421. The cubic root of 1100978856 is about 1032.5862227318.

The spelling of 1100978856 in words is "one billion, one hundred million, nine hundred seventy-eight thousand, eight hundred fifty-six".