1138213785 has 16 divisors (see below), whose sum is σ = 1826398656. Its totient is φ = 605295168.

The previous prime is 1138213771. The next prime is 1138213789. The reversal of 1138213785 is 5873128311.

It is not a de Polignac number, because 1138213785 - 2⁹ = 1138213273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1138213789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104134 + ... + 114543.

It is an arithmetic number, because the mean of its divisors is an integer number (114149916).

Almost surely, 2^1138213785 is an apocalyptic number.

1138213785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1138213785 is a deficient number, since it is larger than the sum of its proper divisors (688184871).

1138213785 is a wasteful number, since it uses less digits than its factorization.

1138213785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219032.

The product of its digits is 40320, while the sum is 39.

The square root of 1138213785 is about 33737.4241014337. The cubic root of 1138213785 is about 1044.0980396693.

The spelling of 1138213785 in words is "one billion, one hundred thirty-eight million, two hundred thirteen thousand, seven hundred eighty-five".