240138437 has 16 divisors (see below), whose sum is σ = 304473600. Its totient is φ = 183945840.

The previous prime is 240138407. The next prime is 240138439. The reversal of 240138437 is 734831042.

It is a cyclic number.

It is not a de Polignac number, because 240138437 - 2⁶ = 240138373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240138439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21887 + ... + 30972.

It is an arithmetic number, because the mean of its divisors is an integer number (19029600).

Almost surely, 2^240138437 is an apocalyptic number.

It is an amenable number.

240138437 is a deficient number, since it is larger than the sum of its proper divisors (64335163).

240138437 is a wasteful number, since it uses less digits than its factorization.

240138437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52936.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 240138437 is about 15496.4007756640. The cubic root of 240138437 is about 621.5659659867.

Adding to 240138437 its reverse (734831042), we get a palindrome (974969479).

The spelling of 240138437 in words is "two hundred forty million, one hundred thirty-eight thousand, four hundred thirty-seven".