240488639 has 2 divisors, whose sum is σ = 240488640. Its totient is φ = 240488638.

The previous prime is 240488627. The next prime is 240488659. The reversal of 240488639 is 936884042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240488639 - 2⁸ = 240488383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240488639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240488609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120244319 + 120244320.

It is an arithmetic number, because the mean of its divisors is an integer number (120244320).

Almost surely, 2^240488639 is an apocalyptic number.

240488639 is a deficient number, since it is larger than the sum of its proper divisors (1).

240488639 is an equidigital number, since it uses as much as digits as its factorization.

240488639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 240488639 is about 15507.6961216036. The cubic root of 240488639 is about 621.8679694465.

The spelling of 240488639 in words is "two hundred forty million, four hundred eighty-eight thousand, six hundred thirty-nine".