1144444515 has 16 divisors (see below), whose sum is σ = 1890180096. Its totient is φ = 590680800.

The previous prime is 1144444513. The next prime is 1144444541. The reversal of 1144444515 is 5154444411.

It is a happy number.

It is not a de Polignac number, because 1144444515 - 2¹ = 1144444513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1144444513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1230121 + ... + 1231050.

It is an arithmetic number, because the mean of its divisors is an integer number (118136256).

Almost surely, 2^1144444515 is an apocalyptic number.

1144444515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1144444515 is a deficient number, since it is larger than the sum of its proper divisors (745735581).

1144444515 is a wasteful number, since it uses less digits than its factorization.

1144444515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461210.

The product of its digits is 25600, while the sum is 33.

The square root of 1144444515 is about 33829.6395931142. The cubic root of 1144444515 is about 1045.9997498741. Note that the first 3 decimals are identical.

Adding to 1144444515 its reverse (5154444411), we get a palindrome (6298888926).

The spelling of 1144444515 in words is "one billion, one hundred forty-four million, four hundred forty-four thousand, five hundred fifteen".