1011803868 has 36 divisors (see below), whose sum is σ = 2562257880. Its totient is φ = 336655776.

The previous prime is 1011803861. The next prime is 1011803893. The reversal of 1011803868 is 8683081101.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1011803868² = 2047494134599522848, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011803861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5178 + ... + 45281.

It is an arithmetic number, because the mean of its divisors is an integer number (71173830).

Almost surely, 2^1011803868 is an apocalyptic number.

1011803868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1011803868 is an abundant number, since it is smaller than the sum of its proper divisors (1550454012).

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

1011803868 is a wasteful number, since it uses less digits than its factorization.

1011803868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51026 (or 51021 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1011803868 is about 31808.8646135004. The cubic root of 1011803868 is about 1003.9192421406.

Adding to 1011803868 its reverse (8683081101), we get a palindrome (9694884969).

The spelling of 1011803868 in words is "one billion, eleven million, eight hundred three thousand, eight hundred sixty-eight".