731988238 has 4 divisors (see below), whose sum is σ = 1097982360. Its totient is φ = 365994118.

The previous prime is 731988233. The next prime is 731988251. The reversal of 731988238 is 832889137.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 731988191 and 731988200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731988233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182997058 + ... + 182997061.

It is an arithmetic number, because the mean of its divisors is an integer number (274495590).

Almost surely, 2^731988238 is an apocalyptic number.

731988238 is a deficient number, since it is larger than the sum of its proper divisors (365994122).

731988238 is a wasteful number, since it uses less digits than its factorization.

731988238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365994121.

The product of its digits is 580608, while the sum is 49.

The square root of 731988238 is about 27055.2811480495. The cubic root of 731988238 is about 901.2280511325.

The spelling of 731988238 in words is "seven hundred thirty-one million, nine hundred eighty-eight thousand, two hundred thirty-eight".