240420399985 has 8 divisors (see below), whose sum is σ = 288622685736. Its totient is φ = 192257516160.

The previous prime is 240420399971. The next prime is 240420399991. The reversal of 240420399985 is 589993024042.

It can be written as a sum of positive squares in 4 ways, for example, as 11308833649 + 229111566336 = 106343^2 + 478656^2 .

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

It is not a de Polignac number, because 240420399985 - 2⁹ = 240420399473 is a prime.

It is a Duffinian 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, 9837054 + ... + 9861463.

It is an arithmetic number, because the mean of its divisors is an integer number (36077835717).

Almost surely, 2^240420399985 is an apocalyptic number.

It is an amenable number.

240420399985 is a deficient number, since it is larger than the sum of its proper divisors (48202285751).

240420399985 is a wasteful number, since it uses less digits than its factorization.

240420399985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19700963.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 240420399985 in words is "two hundred forty billion, four hundred twenty million, three hundred ninety-nine thousand, nine hundred eighty-five".