1144888889 has 8 divisors (see below), whose sum is σ = 1172001600. Its totient is φ = 1117798416.

The previous prime is 1144888873. The next prime is 1144888897. The reversal of 1144888889 is 9888884411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1144888889 - 2⁴ = 1144888873 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1144888819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147887 + ... + 155435.

It is an arithmetic number, because the mean of its divisors is an integer number (146500200).

Almost surely, 2^1144888889 is an apocalyptic number.

It is an amenable number.

1144888889 is a deficient number, since it is larger than the sum of its proper divisors (27112711).

1144888889 is an equidigital number, since it uses as much as digits as its factorization.

1144888889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11119.

The product of its digits is 4718592, while the sum is 59.

The square root of 1144888889 is about 33836.2067761740. The cubic root of 1144888889 is about 1046.1351153838.

The spelling of 1144888889 in words is "one billion, one hundred forty-four million, eight hundred eighty-eight thousand, eight hundred eighty-nine".