1138621140 has 72 divisors (see below), whose sum is σ = 3458827008. Its totient is φ = 303192000.

The previous prime is 1138621093. The next prime is 1138621157. The reversal of 1138621140 is 411268311.

It is a happy number.

1138621140 is a `hidden beast` number, since 1 + 1 + 38 + 621 + 1 + 4 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130969 + ... + 139391.

It is an arithmetic number, because the mean of its divisors is an integer number (48039264).

Almost surely, 2^1138621140 is an apocalyptic number.

1138621140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138621140 is an abundant number, since it is smaller than the sum of its proper divisors (2320205868).

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

1138621140 is a wasteful number, since it uses less digits than its factorization.

1138621140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9189 (or 9184 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1138621140 is about 33743.4606998156. The cubic root of 1138621140 is about 1044.2225821274. Note that the first 3 decimals are identical.

Adding to 1138621140 its reverse (411268311), we get a palindrome (1549889451).

The spelling of 1138621140 in words is "one billion, one hundred thirty-eight million, six hundred twenty-one thousand, one hundred forty".