1238837157 has 12 divisors (see below), whose sum is σ = 1812083520. Its totient is φ = 815436648.

The previous prime is 1238837129. The next prime is 1238837177. The reversal of 1238837157 is 7517388321.

It is not a de Polignac number, because 1238837157 - 2¹¹ = 1238835109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238837177) 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 11 ways as a sum of consecutive naturals, for example, 870483 + ... + 871904.

It is an arithmetic number, because the mean of its divisors is an integer number (151006960).

Almost surely, 2^1238837157 is an apocalyptic number.

It is an amenable number.

1238837157 is a deficient number, since it is larger than the sum of its proper divisors (573246363).

1238837157 is a wasteful number, since it uses less digits than its factorization.

1238837157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742472 (or 1742469 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 1238837157 is about 35197.1185894527. The cubic root of 1238837157 is about 1074.0011365634.

The spelling of 1238837157 in words is "one billion, two hundred thirty-eight million, eight hundred thirty-seven thousand, one hundred fifty-seven".