1538711238 has 48 divisors (see below), whose sum is σ = 3255629760. Its totient is φ = 484756272.

The previous prime is 1538711233. The next prime is 1538711281. The reversal of 1538711238 is 8321178351.

It is a junction number, because it is equal to n+sod(n) for n = 1538711196 and 1538711205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538711233) 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, 1790853 + ... + 1791711.

It is an arithmetic number, because the mean of its divisors is an integer number (67825620).

Almost surely, 2^1538711238 is an apocalyptic number.

1538711238 is an abundant number, since it is smaller than the sum of its proper divisors (1716918522).

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

1538711238 is a wasteful number, since it uses less digits than its factorization.

1538711238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729 (or 1710 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 1538711238 is about 39226.4099555389. The cubic root of 1538711238 is about 1154.4781255822.

Adding to 1538711238 its reverse (8321178351), we get a palindrome (9859889589).

The spelling of 1538711238 in words is "one billion, five hundred thirty-eight million, seven hundred eleven thousand, two hundred thirty-eight".