1144400115 has 64 divisors (see below), whose sum is σ = 1978214400. Its totient is φ = 563157504.

The previous prime is 1144400111. The next prime is 1144400129. The reversal of 1144400115 is 5110044411.

It is not a de Polignac number, because 1144400115 - 2² = 1144400111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1144400091 and 1144400100.

It is not an unprimeable number, because it can be changed into a prime (1144400111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3609937 + ... + 3610253.

It is an arithmetic number, because the mean of its divisors is an integer number (30909600).

Almost surely, 2^1144400115 is an apocalyptic number.

1144400115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1144400115 is a deficient number, since it is larger than the sum of its proper divisors (833814285).

1144400115 is a wasteful number, since it uses less digits than its factorization.

1144400115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1144400115 is about 33828.9833574703. The cubic root of 1144400115 is about 1045.9862227906.

Adding to 1144400115 its reverse (5110044411), we get a palindrome (6254444526).

The spelling of 1144400115 in words is "one billion, one hundred forty-four million, four hundred thousand, one hundred fifteen".