240790405 has 4 divisors (see below), whose sum is σ = 288948492. Its totient is φ = 192632320.

The previous prime is 240790399. The next prime is 240790409. The reversal of 240790405 is 504097042.

240790405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 150749284 + 90041121 = 12278^2 + 9489^2 .

It is not a de Polignac number, because 240790405 - 2⁵ = 240790373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240790409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24079036 + ... + 24079045.

It is an arithmetic number, because the mean of its divisors is an integer number (72237123).

Almost surely, 2^240790405 is an apocalyptic number.

It is an amenable number.

240790405 is a deficient number, since it is larger than the sum of its proper divisors (48158087).

240790405 is an equidigital number, since it uses as much as digits as its factorization.

240790405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48158086.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 240790405 is about 15517.4226274855. The cubic root of 240790405 is about 622.1279681081.

The spelling of 240790405 in words is "two hundred forty million, seven hundred ninety thousand, four hundred five".