1138208140 has 24 divisors (see below), whose sum is σ = 2530840032. Its totient is φ = 428501760.

The previous prime is 1138208119. The next prime is 1138208143. The reversal of 1138208140 is 418028311.

It is a junction number, because it is equal to n+sod(n) for n = 1138208099 and 1138208108.

It is not an unprimeable number, because it can be changed into a prime (1138208143) 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 7 ways as a sum of consecutive naturals, for example, 1673496 + ... + 1674175.

It is an arithmetic number, because the mean of its divisors is an integer number (105451668).

Almost surely, 2^1138208140 is an apocalyptic number.

1138208140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138208140 is an abundant number, since it is smaller than the sum of its proper divisors (1392631892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1138208140 is a wasteful number, since it uses less digits than its factorization.

1138208140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347697 (or 3347695 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1138208140 is about 33737.3404405267. The cubic root of 1138208140 is about 1044.0963135896.

The spelling of 1138208140 in words is "one billion, one hundred thirty-eight million, two hundred eight thousand, one hundred forty".