1138899775 has 48 divisors (see below), whose sum is σ = 1592335584. Its totient is φ = 802414080.

The previous prime is 1138899757. The next prime is 1138899779. The reversal of 1138899775 is 5779988311.

It is not a de Polignac number, because 1138899775 - 2⁵ = 1138899743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138899779) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 636432 + ... + 638218.

It is an arithmetic number, because the mean of its divisors is an integer number (33173658).

Almost surely, 2^1138899775 is an apocalyptic number.

1138899775 is a deficient number, since it is larger than the sum of its proper divisors (453435809).

1138899775 is a wasteful number, since it uses less digits than its factorization.

1138899775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900 (or 1895 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 58.

The square root of 1138899775 is about 33747.5891731543. The cubic root of 1138899775 is about 1044.3077533398.

The spelling of 1138899775 in words is "one billion, one hundred thirty-eight million, eight hundred ninety-nine thousand, seven hundred seventy-five".