1138837894 has 16 divisors (see below), whose sum is σ = 1760058720. Its totient is φ = 552312640.

The previous prime is 1138837867. The next prime is 1138837897. The reversal of 1138837894 is 4987388311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138837897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25954 + ... + 54325.

It is an arithmetic number, because the mean of its divisors is an integer number (110003670).

Almost surely, 2^1138837894 is an apocalyptic number.

1138837894 is a deficient number, since it is larger than the sum of its proper divisors (621220826).

1138837894 is a wasteful number, since it uses less digits than its factorization.

1138837894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80495.

The product of its digits is 1161216, while the sum is 52.

The square root of 1138837894 is about 33746.6723396545. The cubic root of 1138837894 is about 1044.2888391854.

The spelling of 1138837894 in words is "one billion, one hundred thirty-eight million, eight hundred thirty-seven thousand, eight hundred ninety-four".