240340405 has 8 divisors (see below), whose sum is σ = 303588000. Its totient is φ = 182152656.

The previous prime is 240340393. The next prime is 240340411. The reversal of 240340405 is 504043042.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 240340405 - 2⁹ = 240339893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1264855 + ... + 1265044.

It is an arithmetic number, because the mean of its divisors is an integer number (37948500).

Almost surely, 2^240340405 is an apocalyptic number.

It is an amenable number.

240340405 is a deficient number, since it is larger than the sum of its proper divisors (63247595).

240340405 is a wasteful number, since it uses less digits than its factorization.

240340405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529923.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 240340405 is about 15502.9160160274. The cubic root of 240340405 is about 621.7401728025.

Adding to 240340405 its reverse (504043042), we get a palindrome (744383447).

The spelling of 240340405 in words is "two hundred forty million, three hundred forty thousand, four hundred five".