264343506 has 64 divisors (see below), whose sum is σ = 641986560. Its totient is φ = 70836480.

The previous prime is 264343493. The next prime is 264343507. The reversal of 264343506 is 605343462.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (264343507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 307305 + ... + 308163.

It is an arithmetic number, because the mean of its divisors is an integer number (10031040).

Almost surely, 2^264343506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 264343506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320993280).

264343506 is an abundant number, since it is smaller than the sum of its proper divisors (377643054).

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

264343506 is a wasteful number, since it uses less digits than its factorization.

264343506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319.

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 264343506 is about 16258.6440394025. The cubic root of 264343506 is about 641.7849795742.

Adding to 264343506 its reverse (605343462), we get a palindrome (869686968).

The spelling of 264343506 in words is "two hundred sixty-four million, three hundred forty-three thousand, five hundred six".