1155780326 has 32 divisors (see below), whose sum is σ = 1906597440. Its totient is φ = 523027456.

The previous prime is 1155780287. The next prime is 1155780331. The reversal of 1155780326 is 6230875511.

It is a self number, because there is not a number n which added to its sum of digits gives 1155780326.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257090 + ... + 261546.

It is an arithmetic number, because the mean of its divisors is an integer number (59581170).

Almost surely, 2^1155780326 is an apocalyptic number.

1155780326 is a deficient number, since it is larger than the sum of its proper divisors (750817114).

1155780326 is a wasteful number, since it uses less digits than its factorization.

1155780326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4768.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 1155780326 is about 33996.7693465129. The cubic root of 1155780326 is about 1049.4419789276.

The spelling of 1155780326 in words is "one billion, one hundred fifty-five million, seven hundred eighty thousand, three hundred twenty-six".