1189439055 has 48 divisors (see below), whose sum is σ = 2362613760. Its totient is φ = 542268864.

The previous prime is 1189439047. The next prime is 1189439059. The reversal of 1189439055 is 5509349811.

It is not a de Polignac number, because 1189439055 - 2³ = 1189439047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1189439055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189439059) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 115716 + ... + 125574.

It is an arithmetic number, because the mean of its divisors is an integer number (49221120).

Almost surely, 2^1189439055 is an apocalyptic number.

1189439055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1189439055 is a deficient number, since it is larger than the sum of its proper divisors (1173174705).

1189439055 is a wasteful number, since it uses less digits than its factorization.

1189439055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10260 (or 10257 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 1189439055 is about 34488.2451713624. The cubic root of 1189439055 is about 1059.5319682306.

The spelling of 1189439055 in words is "one billion, one hundred eighty-nine million, four hundred thirty-nine thousand, fifty-five".