1144663438 has 16 divisors (see below), whose sum is σ = 1738626624. Its totient is φ = 565148160.

The previous prime is 1144663381. The next prime is 1144663439. The reversal of 1144663438 is 8343664411.

It is a self number, because there is not a number n which added to its sum of digits gives 1144663438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144663439) 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, 82203 + ... + 95113.

It is an arithmetic number, because the mean of its divisors is an integer number (108664164).

Almost surely, 2^1144663438 is an apocalyptic number.

1144663438 is a deficient number, since it is larger than the sum of its proper divisors (593963186).

1144663438 is a wasteful number, since it uses less digits than its factorization.

1144663438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13467.

The product of its digits is 165888, while the sum is 40.

The square root of 1144663438 is about 33832.8751069134. The cubic root of 1144663438 is about 1046.0664427253.

The spelling of 1144663438 in words is "one billion, one hundred forty-four million, six hundred sixty-three thousand, four hundred thirty-eight".