1145804868 has 72 divisors (see below), whose sum is σ = 3154296600. Its totient is φ = 348581376.

The previous prime is 1145804833. The next prime is 1145804917. The reversal of 1145804868 is 8684085411.

1145804868 is a `hidden beast` number, since 1 + 1 + 4 + 580 + 4 + 8 + 68 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 67864644 + 1077940224 = 8238^2 + 32832^2 .

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 23 ways as a sum of consecutive naturals, for example, 27898 + ... + 55406.

It is an arithmetic number, because the mean of its divisors is an integer number (43809675).

Almost surely, 2^1145804868 is an apocalyptic number.

1145804868 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 1145804868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1577148300).

1145804868 is an abundant number, since it is smaller than the sum of its proper divisors (2008491732).

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

1145804868 is a wasteful number, since it uses less digits than its factorization.

1145804868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27621 (or 27616 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The square root of 1145804868 is about 33849.7395558666. The cubic root of 1145804868 is about 1046.4140310557.

The spelling of 1145804868 in words is "one billion, one hundred forty-five million, eight hundred four thousand, eight hundred sixty-eight".