731112138 has 48 divisors (see below), whose sum is σ = 1598197536. Its totient is φ = 241544160.

The previous prime is 731112133. The next prime is 731112143. The reversal of 731112138 is 831211137.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (731112133) and next prime (731112143).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (731112133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1650145 + ... + 1650587.

It is an arithmetic number, because the mean of its divisors is an integer number (33295782).

Almost surely, 2^731112138 is an apocalyptic number.

731112138 is an abundant number, since it is smaller than the sum of its proper divisors (867085398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

731112138 is a wasteful number, since it uses less digits than its factorization.

731112138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1056 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 731112138 is about 27039.0853765433. The cubic root of 731112138 is about 900.8683545014.

The spelling of 731112138 in words is "seven hundred thirty-one million, one hundred twelve thousand, one hundred thirty-eight".