1138723342 has 16 divisors (see below), whose sum is σ = 1810387152. Its totient is φ = 535328640.

The previous prime is 1138723331. The next prime is 1138723343. The reversal of 1138723342 is 2433278311.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 1138723298 and 1138723307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138723343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18313 + ... + 51115.

It is an arithmetic number, because the mean of its divisors is an integer number (113149197).

Almost surely, 2^1138723342 is an apocalyptic number.

1138723342 is a deficient number, since it is larger than the sum of its proper divisors (671663810).

1138723342 is a wasteful number, since it uses less digits than its factorization.

1138723342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33843.

The product of its digits is 24192, while the sum is 34.

The square root of 1138723342 is about 33744.9750629631. The cubic root of 1138723342 is about 1044.2538241387.

The spelling of 1138723342 in words is "one billion, one hundred thirty-eight million, seven hundred twenty-three thousand, three hundred forty-two".