240420400039 has 4 divisors (see below), whose sum is σ = 244956634056. Its totient is φ = 235884166024.

The previous prime is 240420399991. The next prime is 240420400057. The reversal of 240420400039 is 930004024042.

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

It is a cyclic number.

It is not a de Polignac number, because 240420400039 - 2⁷ = 240420399911 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 (240420400069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2268116929 + ... + 2268117034.

It is an arithmetic number, because the mean of its divisors is an integer number (61239158514).

Almost surely, 2^240420400039 is an apocalyptic number.

240420400039 is a deficient number, since it is larger than the sum of its proper divisors (4536234017).

240420400039 is an equidigital number, since it uses as much as digits as its factorization.

240420400039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536234016.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 240420400039 in words is "two hundred forty billion, four hundred twenty million, four hundred thousand, thirty-nine".