1155506004 has 72 divisors (see below), whose sum is σ = 3006592680. Its totient is φ = 373911552.

The previous prime is 1155506003. The next prime is 1155506063. The reversal of 1155506004 is 4006055511.

It is a happy number.

1155506004 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 50 + 600 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 479610000 + 675896004 = 21900^2 + 25998^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155506003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 895792 + ... + 897080.

Almost surely, 2^1155506004 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 1155506004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1503296340).

1155506004 is an abundant number, since it is smaller than the sum of its proper divisors (1851086676).

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

1155506004 is a wasteful number, since it uses less digits than its factorization.

1155506004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009 (or 2004 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1155506004 is about 33992.7345766709. The cubic root of 1155506004 is about 1049.3589447514.

The spelling of 1155506004 in words is "one billion, one hundred fifty-five million, five hundred six thousand, four".