1138739205 has 32 divisors (see below), whose sum is σ = 1848096000. Its totient is φ = 598687232.

The previous prime is 1138739183. The next prime is 1138739209. The reversal of 1138739205 is 5029378311.

It is a cyclic number.

It is not a de Polignac number, because 1138739205 - 2⁸ = 1138738949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138739209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304336 + ... + 308054.

It is an arithmetic number, because the mean of its divisors is an integer number (57753000).

Almost surely, 2^1138739205 is an apocalyptic number.

1138739205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1138739205 is a deficient number, since it is larger than the sum of its proper divisors (709356795).

1138739205 is a wasteful number, since it uses less digits than its factorization.

1138739205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1138739205 is about 33745.2101045467. The cubic root of 1138739205 is about 1044.2586731132.

The spelling of 1138739205 in words is "one billion, one hundred thirty-eight million, seven hundred thirty-nine thousand, two hundred five".