1138800444 has 48 divisors (see below), whose sum is σ = 2695140000. Its totient is φ = 374219776.

The previous prime is 1138800419. The next prime is 1138800457. The reversal of 1138800444 is 4440088311.

It is a congruent 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, 242632 + ... + 247280.

It is an arithmetic number, because the mean of its divisors is an integer number (56148750).

Almost surely, 2^1138800444 is an apocalyptic number.

It is an amenable number.

1138800444 is an abundant number, since it is smaller than the sum of its proper divisors (1556339556).

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

1138800444 is a wasteful number, since it uses less digits than its factorization.

1138800444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4942 (or 4940 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 1138800444 is about 33746.1174655693. The cubic root of 1138800444 is about 1044.2773921229.

Adding to 1138800444 its reverse (4440088311), we get a palindrome (5578888755).

The spelling of 1138800444 in words is "one billion, one hundred thirty-eight million, eight hundred thousand, four hundred forty-four".