1155732740 has 24 divisors (see below), whose sum is σ = 2492635992. Its totient is φ = 449798400.

The previous prime is 1155732733. The next prime is 1155732749. The reversal of 1155732740 is 472375511.

It can be written as a sum of positive squares in 4 ways, for example, as 433305856 + 722426884 = 20816^2 + 26878^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1155732740.

It is not an unprimeable number, because it can be changed into a prime (1155732749) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 780161 + ... + 781640.

It is an arithmetic number, because the mean of its divisors is an integer number (103859833).

Almost surely, 2^1155732740 is an apocalyptic number.

1155732740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155732740 is an abundant number, since it is smaller than the sum of its proper divisors (1336903252).

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

1155732740 is a wasteful number, since it uses less digits than its factorization.

1155732740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561847 (or 1561845 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 1155732740 is about 33996.0694786912. The cubic root of 1155732740 is about 1049.4275761239.

The spelling of 1155732740 in words is "one billion, one hundred fifty-five million, seven hundred thirty-two thousand, seven hundred forty".