1238738734 has 8 divisors (see below), whose sum is σ = 1918047168. Its totient is φ = 599389680.

The previous prime is 1238738731. The next prime is 1238738749. The reversal of 1238738734 is 4378378321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1238738734² = 3068947302223845512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238738731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9989767 + ... + 9989890.

It is an arithmetic number, because the mean of its divisors is an integer number (239755896).

Almost surely, 2^1238738734 is an apocalyptic number.

1238738734 is a deficient number, since it is larger than the sum of its proper divisors (679308434).

1238738734 is a wasteful number, since it uses less digits than its factorization.

1238738734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19979690.

The product of its digits is 677376, while the sum is 46.

The square root of 1238738734 is about 35195.7203932524. The cubic root of 1238738734 is about 1073.9726934349.

The spelling of 1238738734 in words is "one billion, two hundred thirty-eight million, seven hundred thirty-eight thousand, seven hundred thirty-four".