240909 has 8 divisors (see below), whose sum is σ = 324192. Its totient is φ = 159120.

The previous prime is 240899. The next prime is 240913. The reversal of 240909 is 909042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 240909 - 2⁴ = 240893 is a prime.

240909 is a modest number, since divided by 909 gives 24 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87 + ... + 699.

It is an arithmetic number, because the mean of its divisors is an integer number (40524).

2²⁴⁰⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

240909 is a deficient number, since it is larger than the sum of its proper divisors (83283).

240909 is a wasteful number, since it uses less digits than its factorization.

240909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 240909 is about 490.8248159985. The cubic root of 240909 is about 62.2230088950.

It can be divided in two parts, 2 and 40909, that multiplied together give a palindrome (81818).

The spelling of 240909 in words is "two hundred forty thousand, nine hundred nine".