1138404447 has 6 divisors (see below), whose sum is σ = 1644361992. Its totient is φ = 758936292.

The previous prime is 1138404433. The next prime is 1138404461. The reversal of 1138404447 is 7444048311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1138404433) and next prime (1138404461).

It is not a de Polignac number, because 1138404447 - 2¹⁵ = 1138371679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138404427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63244683 + ... + 63244700.

It is an arithmetic number, because the mean of its divisors is an integer number (274060332).

Almost surely, 2^1138404447 is an apocalyptic number.

1138404447 is a deficient number, since it is larger than the sum of its proper divisors (505957545).

1138404447 is a wasteful number, since it uses less digits than its factorization.

1138404447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126489389 (or 126489386 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 1138404447 is about 33740.2496582346. The cubic root of 1138404447 is about 1044.1563353102.

The spelling of 1138404447 in words is "one billion, one hundred thirty-eight million, four hundred four thousand, four hundred forty-seven".