1138444803 has 24 divisors (see below), whose sum is σ = 1656951296. Its totient is φ = 753202800.

The previous prime is 1138444787. The next prime is 1138444817. The reversal of 1138444803 is 3084448311.

1138444803 is a `hidden beast` number, since 1 + 138 + 44 + 480 + 3 = 666.

It is not a de Polignac number, because 1138444803 - 2⁴ = 1138444787 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138444843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 924198 + ... + 925428.

Almost surely, 2^1138444803 is an apocalyptic number.

1138444803 is a deficient number, since it is larger than the sum of its proper divisors (518506493).

1138444803 is a wasteful number, since it uses less digits than its factorization.

1138444803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 1138444803 is about 33740.8476923743. The cubic root of 1138444803 is about 1044.1686734779.

The spelling of 1138444803 in words is "one billion, one hundred thirty-eight million, four hundred forty-four thousand, eight hundred three".