1238840237 has 6 divisors (see below), whose sum is σ = 1295045262. Its totient is φ = 1184977112.

The previous prime is 1238840231. The next prime is 1238840293. The reversal of 1238840237 is 7320488321.

It can be written as a sum of positive squares in only one way, i.e., 1193426116 + 45414121 = 34546^2 + 6739^2 .

It is not a de Polignac number, because 1238840237 - 2⁸ = 1238839981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1238840237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238840231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1170398 + ... + 1171455.

It is an arithmetic number, because the mean of its divisors is an integer number (215840877).

Almost surely, 2^1238840237 is an apocalyptic number.

It is an amenable number.

1238840237 is a deficient number, since it is larger than the sum of its proper divisors (56205025).

1238840237 is an equidigital number, since it uses as much as digits as its factorization.

1238840237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341899 (or 2341876 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 1238840237 is about 35197.1623430071. The cubic root of 1238840237 is about 1074.0020266241.

It can be divided in two parts, 12388 and 40237, that added together give a palindrome (52625).

The spelling of 1238840237 in words is "one billion, two hundred thirty-eight million, eight hundred forty thousand, two hundred thirty-seven".