264478385 has 16 divisors (see below), whose sum is σ = 335343360. Its totient is φ = 199687680.

The previous prime is 264478373. The next prime is 264478387. The reversal of 264478385 is 583874462.

It is not a de Polignac number, because 264478385 - 2¹² = 264474289 is a prime.

It is a super-2 number, since 2×264478385² = 139897632264416450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (264478387) 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, 20609 + ... + 30881.

It is an arithmetic number, because the mean of its divisors is an integer number (20958960).

Almost surely, 2^264478385 is an apocalyptic number.

It is an amenable number.

264478385 is a deficient number, since it is larger than the sum of its proper divisors (70864975).

264478385 is a wasteful number, since it uses less digits than its factorization.

264478385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10568.

The product of its digits is 1290240, while the sum is 47.

The square root of 264478385 is about 16262.7914270583. The cubic root of 264478385 is about 641.8941161027.

The spelling of 264478385 in words is "two hundred sixty-four million, four hundred seventy-eight thousand, three hundred eighty-five".