1138709085 has 8 divisors (see below), whose sum is σ = 1821934560. Its totient is φ = 607311504.

The previous prime is 1138709069. The next prime is 1138709111. The reversal of 1138709085 is 5809078311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1138709085 - 2⁴ = 1138709069 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37956955 + ... + 37956984.

It is an arithmetic number, because the mean of its divisors is an integer number (227741820).

Almost surely, 2^1138709085 is an apocalyptic number.

1138709085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1138709085 is a deficient number, since it is larger than the sum of its proper divisors (683225475).

1138709085 is an equidigital number, since it uses as much as digits as its factorization.

1138709085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75913947.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 1138709085 is about 33744.7638160352. The cubic root of 1138709085 is about 1044.2494660450.

The spelling of 1138709085 in words is "one billion, one hundred thirty-eight million, seven hundred nine thousand, eighty-five".