1138866993 has 48 divisors (see below), whose sum is σ = 1892358720. Its totient is φ = 671328000.

The previous prime is 1138866991. The next prime is 1138867003. The reversal of 1138866993 is 3996688311.

It is not a de Polignac number, because 1138866993 - 2¹ = 1138866991 is a prime.

It is a super-3 number, since 3×1138866993³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1138866991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 405193 + ... + 407993.

It is an arithmetic number, because the mean of its divisors is an integer number (39424140).

Almost surely, 2^1138866993 is an apocalyptic number.

It is an amenable number.

1138866993 is a deficient number, since it is larger than the sum of its proper divisors (753491727).

1138866993 is a wasteful number, since it uses less digits than its factorization.

1138866993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895 (or 2852 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 1138866993 is about 33747.1034757059. The cubic root of 1138866993 is about 1044.2977334867.

The spelling of 1138866993 in words is "one billion, one hundred thirty-eight million, eight hundred sixty-six thousand, nine hundred ninety-three".