240240404389 has 2 divisors, whose sum is σ = 240240404390. Its totient is φ = 240240404388.

The previous prime is 240240404377. The next prime is 240240404473. The reversal of 240240404389 is 983404042042.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185918779489 + 54321624900 = 431183^2 + 233070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240240404389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240240404309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120120202194 + 120120202195.

It is an arithmetic number, because the mean of its divisors is an integer number (120120202195).

Almost surely, 2^240240404389 is an apocalyptic number.

It is an amenable number.

240240404389 is a deficient number, since it is larger than the sum of its proper divisors (1).

240240404389 is an equidigital number, since it uses as much as digits as its factorization.

240240404389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 40.

The spelling of 240240404389 in words is "two hundred forty billion, two hundred forty million, four hundred four thousand, three hundred eighty-nine".