264340403 has 8 divisors (see below), whose sum is σ = 276530976. Its totient is φ = 252208000.

The previous prime is 264340337. The next prime is 264340451. The reversal of 264340403 is 304043462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264340403 - 2¹⁸ = 264078259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264340303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5108 + ... + 23553.

It is an arithmetic number, because the mean of its divisors is an integer number (34566372).

Almost surely, 2^264340403 is an apocalyptic number.

264340403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

264340403 is a deficient number, since it is larger than the sum of its proper divisors (12190573).

264340403 is a wasteful number, since it uses less digits than its factorization.

264340403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29085.

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 264340403 is about 16258.5486129605. The cubic root of 264340403 is about 641.7824683637.

Adding to 264340403 its reverse (304043462), we get a palindrome (568383865).

The spelling of 264340403 in words is "two hundred sixty-four million, three hundred forty thousand, four hundred three".