1155054440 has 32 divisors (see below), whose sum is σ = 2647912680. Its totient is φ = 453303552.

The previous prime is 1155054377. The next prime is 1155054449. The reversal of 1155054440 is 444505511.

It can be written as a sum of positive squares in 4 ways, for example, as 913127524 + 241926916 = 30218^2 + 15554^2 .

It is not an unprimeable number, because it can be changed into a prime (1155054449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270299 + ... + 274538.

Almost surely, 2^1155054440 is an apocalyptic number.

1155054440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155054440 is an abundant number, since it is smaller than the sum of its proper divisors (1492858240).

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

1155054440 is a wasteful number, since it uses less digits than its factorization.

1155054440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544901 (or 544897 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 1155054440 is about 33986.0918612305. The cubic root of 1155054440 is about 1049.2222327942. Note that the first 4 decimals are identical.

Adding to 1155054440 its reverse (444505511), we get a palindrome (1599559951).

The spelling of 1155054440 in words is "one billion, one hundred fifty-five million, fifty-four thousand, four hundred forty".