1139723438 has 12 divisors (see below), whose sum is σ = 1988701272. Its totient is φ = 488452860.

The previous prime is 1139723419. The next prime is 1139723467. The reversal of 1139723438 is 8343279311.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1139723395 and 1139723404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5814818 + ... + 5815013.

It is an arithmetic number, because the mean of its divisors is an integer number (165725106).

Almost surely, 2^1139723438 is an apocalyptic number.

1139723438 is a deficient number, since it is larger than the sum of its proper divisors (848977834).

1139723438 is a wasteful number, since it uses less digits than its factorization.

1139723438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11629847 (or 11629840 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 1139723438 is about 33759.7902540878. The cubic root of 1139723438 is about 1044.5594437288.

The spelling of 1139723438 in words is "one billion, one hundred thirty-nine million, seven hundred twenty-three thousand, four hundred thirty-eight".