1144400004 has 144 divisors (see below), whose sum is σ = 3229873920. Its totient is φ = 338757120.

The previous prime is 1144399987. The next prime is 1144400011. The reversal of 1144400004 is 4000044411.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1144400004.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4911472 + ... + 4911704.

It is an arithmetic number, because the mean of its divisors is an integer number (22429680).

Almost surely, 2^1144400004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1144400004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1614936960).

1144400004 is an abundant number, since it is smaller than the sum of its proper divisors (2085473916).

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

1144400004 is a wasteful number, since it uses less digits than its factorization.

1144400004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1144400004 is about 33828.9817168652. The cubic root of 1144400004 is about 1045.9861889725.

Adding to 1144400004 its reverse (4000044411), we get a palindrome (5144444415).

The spelling of 1144400004 in words is "one billion, one hundred forty-four million, four hundred thousand, four".