1100861008 has 40 divisors (see below), whose sum is σ = 2306624936. Its totient is φ = 505958400.

The previous prime is 1100860997. The next prime is 1100861009. The reversal of 1100861008 is 8001680011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 238146624 + 862714384 = 15432^2 + 29372^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100861009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39148 + ... + 61108.

Almost surely, 2^1100861008 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 1100861008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153312468).

1100861008 is an abundant number, since it is smaller than the sum of its proper divisors (1205763928).

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

1100861008 is a wasteful number, since it uses less digits than its factorization.

1100861008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22223 (or 22217 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 1100861008 is about 33179.2255485266. The cubic root of 1100861008 is about 1032.5493789836.

The spelling of 1100861008 in words is "one billion, one hundred million, eight hundred sixty-one thousand, eight".