240340386905 has 4 divisors (see below), whose sum is σ = 288408464292. Its totient is φ = 192272309520.

The previous prime is 240340386899. The next prime is 240340386911. The reversal of 240340386905 is 509683043042.

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

It is an interprime number because it is at equal distance from previous prime (240340386899) and next prime (240340386911).

It can be written as a sum of positive squares in 2 ways, for example, as 51391076416 + 188949310489 = 226696^2 + 434683^2 .

It is a de Polignac number, because none of the positive numbers 2^k-240340386905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24034038686 + ... + 24034038695.

It is an arithmetic number, because the mean of its divisors is an integer number (72102116073).

Almost surely, 2^240340386905 is an apocalyptic number.

It is an amenable number.

240340386905 is a deficient number, since it is larger than the sum of its proper divisors (48068077387).

240340386905 is an equidigital number, since it uses as much as digits as its factorization.

240340386905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48068077386.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 240340386905 in words is "two hundred forty billion, three hundred forty million, three hundred eighty-six thousand, nine hundred five".