264840415 has 16 divisors (see below), whose sum is σ = 367295040. Its totient is φ = 179562240.

The previous prime is 264840379. The next prime is 264840419. The reversal of 264840415 is 514048462.

It is not a de Polignac number, because 264840415 - 2¹⁹ = 264316127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264840419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39396 + ... + 45625.

It is an arithmetic number, because the mean of its divisors is an integer number (22955940).

Almost surely, 2^264840415 is an apocalyptic number.

264840415 is a deficient number, since it is larger than the sum of its proper divisors (102454625).

264840415 is an equidigital number, since it uses as much as digits as its factorization.

264840415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85122.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 264840415 is about 16273.9182436191. The cubic root of 264840415 is about 642.1868671523.

Adding to 264840415 its reverse (514048462), we get a palindrome (778888877).

The spelling of 264840415 in words is "two hundred sixty-four million, eight hundred forty thousand, four hundred fifteen".