1138940859 has 24 divisors (see below), whose sum is σ = 1771268160. Its totient is φ = 649074384.

The previous prime is 1138940851. The next prime is 1138940861. The reversal of 1138940859 is 9580498311.

It is not a de Polignac number, because 1138940859 - 2³ = 1138940851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1138940851) by changing a digit.

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, 45492 + ... + 65934.

It is an arithmetic number, because the mean of its divisors is an integer number (73802840).

Almost surely, 2^1138940859 is an apocalyptic number.

1138940859 is a deficient number, since it is larger than the sum of its proper divisors (632327301).

1138940859 is a wasteful number, since it uses less digits than its factorization.

1138940859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20839 (or 20832 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 1138940859 is about 33748.1978629971. The cubic root of 1138940859 is about 1044.3203104365.

The spelling of 1138940859 in words is "one billion, one hundred thirty-eight million, nine hundred forty thousand, eight hundred fifty-nine".