240240405 has 16 divisors (see below), whose sum is σ = 401097600. Its totient is φ = 122557248.

The previous prime is 240240401. The next prime is 240240419. The reversal of 240240405 is 504042042.

240240405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 240240405 - 2² = 240240401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240240401) 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, 347830 + ... + 348519.

It is an arithmetic number, because the mean of its divisors is an integer number (25068600).

Almost surely, 2^240240405 is an apocalyptic number.

It is an amenable number.

240240405 is a deficient number, since it is larger than the sum of its proper divisors (160857195).

240240405 is a wasteful number, since it uses less digits than its factorization.

240240405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696380.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 240240405 is about 15499.6904807806. The cubic root of 240240405 is about 621.6539303438.

Adding to 240240405 its reverse (504042042), we get a palindrome (744282447).

The spelling of 240240405 in words is "two hundred forty million, two hundred forty thousand, four hundred five".