1155341440 has 128 divisors (see below), whose sum is σ = 3117528000. Its totient is φ = 405565440.

The previous prime is 1155341399. The next prime is 1155341477. The reversal of 1155341440 is 441435511.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 1155341399 and 1155341408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201331 + ... + 206989.

Almost surely, 2^1155341440 is an apocalyptic number.

1155341440 is a gapful number since it is divisible by the number (10) 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 1155341440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1558764000).

1155341440 is an abundant number, since it is smaller than the sum of its proper divisors (1962186560).

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

1155341440 is a wasteful number, since it uses less digits than its factorization.

1155341440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5718 (or 5706 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1155341440 is about 33990.3139144080. The cubic root of 1155341440 is about 1049.3091267775.

Adding to 1155341440 its reverse (441435511), we get a palindrome (1596776951).

The spelling of 1155341440 in words is "one billion, one hundred fifty-five million, three hundred forty-one thousand, four hundred forty".