1155844480 has 256 divisors, whose sum is σ = 3423283200. Its totient is φ = 364290048.

The previous prime is 1155844453. The next prime is 1155844541. The reversal of 1155844480 is 844485511.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3149257 + ... + 3149623.

It is an arithmetic number, because the mean of its divisors is an integer number (13372200).

Almost surely, 2^1155844480 is an apocalyptic number.

1155844480 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 1155844480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1711641600).

1155844480 is an abundant number, since it is smaller than the sum of its proper divisors (2267438720).

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

1155844480 is a wasteful number, since it uses less digits than its factorization.

1155844480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 40.

The square root of 1155844480 is about 33997.7128642501. The cubic root of 1155844480 is about 1049.4613957244.

The spelling of 1155844480 in words is "one billion, one hundred fifty-five million, eight hundred forty-four thousand, four hundred eighty".