1155438344 has 16 divisors (see below), whose sum is σ = 2187481920. Its totient is φ = 572109840.

The previous prime is 1155438341. The next prime is 1155438367. The reversal of 1155438344 is 4438345511.

It is a junction number, because it is equal to n+sod(n) for n = 1155438298 and 1155438307.

It is not an unprimeable number, because it can be changed into a prime (1155438341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700292 + ... + 701939.

It is an arithmetic number, because the mean of its divisors is an integer number (136717620).

Almost surely, 2^1155438344 is an apocalyptic number.

It is an amenable number.

1155438344 is a deficient number, since it is larger than the sum of its proper divisors (1032043576).

1155438344 is a wasteful number, since it uses less digits than its factorization.

1155438344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402340 (or 1402336 counting only the distinct ones).

The product of its digits is 115200, while the sum is 38.

The square root of 1155438344 is about 33991.7393494361. The cubic root of 1155438344 is about 1049.3384628119.

The spelling of 1155438344 in words is "one billion, one hundred fifty-five million, four hundred thirty-eight thousand, three hundred forty-four".