240820785 has 48 divisors (see below), whose sum is σ = 436035600. Its totient is φ = 122798592.

The previous prime is 240820781. The next prime is 240820799. The reversal of 240820785 is 587028042.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 74529 + 240746256 = 273^2 + 15516^2 .

It is not a de Polignac number, because 240820785 - 2² = 240820781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (240820781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 141399 + ... + 143091.

It is an arithmetic number, because the mean of its divisors is an integer number (9084075).

Almost surely, 2^240820785 is an apocalyptic number.

It is an amenable number.

240820785 is a deficient number, since it is larger than the sum of its proper divisors (195214815).

240820785 is a wasteful number, since it uses less digits than its factorization.

240820785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842 (or 1839 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 240820785 is about 15518.4014962882. The cubic root of 240820785 is about 622.1541311839.

The spelling of 240820785 in words is "two hundred forty million, eight hundred twenty thousand, seven hundred eighty-five".