264640326 has 32 divisors (see below), whose sum is σ = 569615328. Its totient is φ = 81661440.

The previous prime is 264640307. The next prime is 264640333. The reversal of 264640326 is 623046462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15045 + ... + 27488.

It is an arithmetic number, because the mean of its divisors is an integer number (17800479).

Almost surely, 2^264640326 is an apocalyptic number.

264640326 is an abundant number, since it is smaller than the sum of its proper divisors (304975002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

264640326 is a wasteful number, since it uses less digits than its factorization.

264640326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42616.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 264640326 is about 16267.7695459458. The cubic root of 264640326 is about 642.0251006772.

Adding to 264640326 its reverse (623046462), we get a palindrome (887686788).

The spelling of 264640326 in words is "two hundred sixty-four million, six hundred forty thousand, three hundred twenty-six".