1144260138 has 32 divisors (see below), whose sum is σ = 2620103040. Its totient is φ = 326350080.

The previous prime is 1144260121. The next prime is 1144260193. The reversal of 1144260138 is 8310624411.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43 + ... + 47838.

It is an arithmetic number, because the mean of its divisors is an integer number (81878220).

Almost surely, 2^1144260138 is an apocalyptic number.

1144260138 is an abundant number, since it is smaller than the sum of its proper divisors (1475842902).

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

1144260138 is a wasteful number, since it uses less digits than its factorization.

1144260138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48462.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1144260138 is about 33826.9144025878. The cubic root of 1144260138 is about 1045.9435745416.

Adding to 1144260138 its reverse (8310624411), we get a palindrome (9454884549).

The spelling of 1144260138 in words is "one billion, one hundred forty-four million, two hundred sixty thousand, one hundred thirty-eight".