240638 has 4 divisors (see below), whose sum is σ = 360960. Its totient is φ = 120318.

The previous prime is 240631. The next prime is 240641. The reversal of 240638 is 836042.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 240638.

It is not an unprimeable number, because it can be changed into a prime (240631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60158 + ... + 60161.

It is an arithmetic number, because the mean of its divisors is an integer number (90240).

2²⁴⁰⁶³⁸ is an apocalyptic number.

240638 is a deficient number, since it is larger than the sum of its proper divisors (120322).

240638 is a wasteful number, since it uses less digits than its factorization.

240638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120321.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 240638 is about 490.5486724067. The cubic root of 240638 is about 62.1996684604.

It can be divided in two parts, 240 and 638, that added together give a palindrome (878).

The spelling of 240638 in words is "two hundred forty thousand, six hundred thirty-eight".