1139445618 has 32 divisors (see below), whose sum is σ = 2400503040. Its totient is φ = 359574480.

The previous prime is 1139445611. The next prime is 1139445623. The reversal of 1139445618 is 8165449311.

It is a self number, because there is not a number n which added to its sum of digits gives 1139445618.

It is not an unprimeable number, because it can be changed into a prime (1139445611) 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 15 ways as a sum of consecutive naturals, for example, 228613 + ... + 233543.

It is an arithmetic number, because the mean of its divisors is an integer number (75015720).

Almost surely, 2^1139445618 is an apocalyptic number.

1139445618 is an abundant number, since it is smaller than the sum of its proper divisors (1261057422).

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

1139445618 is a wasteful number, since it uses less digits than its factorization.

1139445618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6982.

The product of its digits is 103680, while the sum is 42.

The square root of 1139445618 is about 33755.6753450438. The cubic root of 1139445618 is about 1044.4745625849.

The spelling of 1139445618 in words is "one billion, one hundred thirty-nine million, four hundred forty-five thousand, six hundred eighteen".