240440013 has 12 divisors (see below), whose sum is σ = 378875328. Its totient is φ = 145721160.

The previous prime is 240439981. The next prime is 240440029. The reversal of 240440013 is 310044042.

It is not a de Polignac number, because 240440013 - 2⁵ = 240439981 is a prime.

It is a super-2 number, since 2×240440013² = 115622799702880338, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240440033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1214245 + ... + 1214442.

It is an arithmetic number, because the mean of its divisors is an integer number (31572944).

Almost surely, 2^240440013 is an apocalyptic number.

It is an amenable number.

240440013 is a deficient number, since it is larger than the sum of its proper divisors (138435315).

240440013 is a wasteful number, since it uses less digits than its factorization.

240440013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428704 (or 2428701 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 240440013 is about 15506.1282401507. The cubic root of 240440013 is about 621.8260534122.

Adding to 240440013 its reverse (310044042), we get a palindrome (550484055).

The spelling of 240440013 in words is "two hundred forty million, four hundred forty thousand, thirteen".