264440660 has 72 divisors (see below), whose sum is σ = 637072128. Its totient is φ = 91960000.

The previous prime is 264440639. The next prime is 264440663. The reversal of 264440660 is 66044462.

264440660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×264440660² = 139857725322471200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264440663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53285 + ... + 58035.

It is an arithmetic number, because the mean of its divisors is an integer number (8848224).

Almost surely, 2^264440660 is an apocalyptic number.

264440660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 264440660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318536064).

264440660 is an abundant number, since it is smaller than the sum of its proper divisors (372631468).

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

264440660 is a wasteful number, since it uses less digits than its factorization.

264440660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805 (or 4792 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 264440660 is about 16261.6315294622. The cubic root of 264440660 is about 641.8635948851.

The spelling of 264440660 in words is "two hundred sixty-four million, four hundred forty thousand, six hundred sixty".