1153444356 has 36 divisors (see below), whose sum is σ = 3087161532. Its totient is φ = 361864704.

The previous prime is 1153444351. The next prime is 1153444399. The reversal of 1153444356 is 6534443511.

It can be written as a sum of positive squares in 2 ways, for example, as 980942400 + 172501956 = 31320^2 + 13134^2 .

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

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

It is a self number, because there is not a number n which added to its sum of digits gives 1153444356.

It is not an unprimeable number, because it can be changed into a prime (1153444351) 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, 941745 + ... + 942968.

It is an arithmetic number, because the mean of its divisors is an integer number (85754487).

Almost surely, 2^1153444356 is an apocalyptic number.

It is an amenable number.

1153444356 is an abundant number, since it is smaller than the sum of its proper divisors (1933717176).

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

1153444356 is a wasteful number, since it uses less digits than its factorization.

1153444356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884740 (or 1884735 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 1153444356 is about 33962.3962052150. The cubic root of 1153444356 is about 1048.7344862351.

Adding to 1153444356 its reverse (6534443511), we get a palindrome (7687887867).

The spelling of 1153444356 in words is "one billion, one hundred fifty-three million, four hundred forty-four thousand, three hundred fifty-six".