1155388888 has 8 divisors (see below), whose sum is σ = 2166354180. Its totient is φ = 577694440.

The previous prime is 1155388873. The next prime is 1155388907. The reversal of 1155388888 is 8888835511.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 72211798 + ... + 72211813.

Almost surely, 2^1155388888 is an apocalyptic number.

It is an amenable number.

1155388888 is a deficient number, since it is larger than the sum of its proper divisors (1010965292).

1155388888 is a wasteful number, since it uses less digits than its factorization.

1155388888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144423617 (or 144423613 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 55.

The square root of 1155388888 is about 33991.0118707873. The cubic root of 1155388888 is about 1049.3234910558.

The spelling of 1155388888 in words is "one billion, one hundred fifty-five million, three hundred eighty-eight thousand, eight hundred eighty-eight".