240638311 has 2 divisors, whose sum is σ = 240638312. Its totient is φ = 240638310.

The previous prime is 240638309. The next prime is 240638323. The reversal of 240638311 is 113836042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240638311 - 2¹ = 240638309 is a prime.

Together with 240638309, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 240638311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240638341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120319155 + 120319156.

It is an arithmetic number, because the mean of its divisors is an integer number (120319156).

Almost surely, 2^240638311 is an apocalyptic number.

240638311 is a deficient number, since it is larger than the sum of its proper divisors (1).

240638311 is an equidigital number, since it uses as much as digits as its factorization.

240638311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 240638311 is about 15512.5211039341. The cubic root of 240638311 is about 621.9969525600.

The spelling of 240638311 in words is "two hundred forty million, six hundred thirty-eight thousand, three hundred eleven".