1155894804 has 108 divisors (see below), whose sum is σ = 3123468348. Its totient is φ = 360345600.

The previous prime is 1155894797. The next prime is 1155894809. The reversal of 1155894804 is 4084985511.

It is a happy number.

1155894804 is a `hidden beast` number, since 1 + 1 + 558 + 94 + 8 + 0 + 4 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 125484804 + 1030410000 = 11202^2 + 32100^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1155894804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155894809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2507134 + ... + 2507594.

Almost surely, 2^1155894804 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 1155894804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1561734174).

1155894804 is an abundant number, since it is smaller than the sum of its proper divisors (1967573544).

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

1155894804 is a wasteful number, since it uses less digits than its factorization.

1155894804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The square root of 1155894804 is about 33998.4529648041. The cubic root of 1155894804 is about 1049.4766262419.

The spelling of 1155894804 in words is "one billion, one hundred fifty-five million, eight hundred ninety-four thousand, eight hundred four".