1100561868 has 144 divisors (see below), whose sum is σ = 3333657600. Its totient is φ = 299325312.

The previous prime is 1100561843. The next prime is 1100561887. The reversal of 1100561868 is 8681650011.

1100561868 is a `hidden beast` number, since 1 + 10 + 0 + 561 + 86 + 8 = 666.

It is a super-2 number, since 2×1100561868² = 2422472850591298848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1837033 + ... + 1837631.

It is an arithmetic number, because the mean of its divisors is an integer number (23150400).

Almost surely, 2^1100561868 is an apocalyptic number.

1100561868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1100561868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666828800).

1100561868 is an abundant number, since it is smaller than the sum of its proper divisors (2233095732).

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

1100561868 is a wasteful number, since it uses less digits than its factorization.

1100561868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 1100561868 is about 33174.7173009809. The cubic root of 1100561868 is about 1032.4558446802.

The spelling of 1100561868 in words is "one billion, one hundred million, five hundred sixty-one thousand, eight hundred sixty-eight".