1240635238 has 16 divisors (see below), whose sum is σ = 1894528944. Its totient is φ = 609223680.

The previous prime is 1240635223. The next prime is 1240635251. The reversal of 1240635238 is 8325360421.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1006 + ... + 49822.

It is an arithmetic number, because the mean of its divisors is an integer number (118408059).

Almost surely, 2^1240635238 is an apocalyptic number.

1240635238 is a deficient number, since it is larger than the sum of its proper divisors (653893706).

1240635238 is a wasteful number, since it uses less digits than its factorization.

1240635238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49047.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 1240635238 is about 35222.6523419234. The cubic root of 1240635238 is about 1074.5204965875.

Adding to 1240635238 its reverse (8325360421), we get a palindrome (9565995659).

The spelling of 1240635238 in words is "one billion, two hundred forty million, six hundred thirty-five thousand, two hundred thirty-eight".